Done in Python but not E[edit]
A
- A* search algorithm
- A+B
- ABC problem
- ABC words
- ADFGVX cipher
- AKS test for primes
- ASCII art diagram converter
- AVL tree
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abelian sandpile model/Identity
- Abundant, deficient and perfect number classifications
- Abundant odd numbers
- Active Directory/Connect
- Active Directory/Search for a user
- Add a variable to a class instance at runtime
- Addition chains
- Additive primes
- Air mass
- Aliquot sequence classifications
- Almkvist-Giullera formula for pi
- Almost prime
- Alternade words
- Amicable pairs
- Anagrams/Deranged anagrams
- Angle difference between two bearings
- Angles (geometric), normalization and conversion
- Anonymous recursion
- Anti-primes
- Append a record to the end of a text file
- Append numbers at same position in strings
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Archimedean spiral
- Arena storage pool
- Arithmetic-geometric mean
- Arithmetic-geometric mean/Calculate Pi
- Arithmetic/Complex
- Arithmetic/Rational
- Arithmetic coding/As a generalized change of radix
- Array length
- Aspect oriented programming
- Associative array/Merging
- Attractive numbers
- Audio alarm
- Average loop length
- Averages/Mean angle
- Averages/Mean time of day
B
- Babbage problem
- Babylonian spiral
- Bacon cipher
- Balanced brackets
- Balanced ternary
- Banker's algorithm
- Barnsley fern
- Base58Check encoding
- Base64 decode data
- Base64 encode data
- Base 16 numbers needing a to f
- Bell numbers
- Benford's law
- Bernoulli numbers
- Best shuffle
- Bilinear interpolation
- Bin given limits
- Binary digits
- Bioinformatics/Global alignment
- Bioinformatics/Sequence mutation
- Bioinformatics/Subsequence
- Bioinformatics/base count
- Biorhythms
- Birthday problem
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap/Bézier curves/Cubic
- Bitmap/Bézier curves/Quadratic
- Bitmap/Histogram
- Bitmap/Midpoint circle algorithm
- Bitmap/PPM conversion through a pipe
- Bitmap/Read an image through a pipe
- Bitwise IO
- Box the compass
- Brace expansion
- Brace expansion using ranges
- Brazilian numbers
- Brownian tree
- Bulls and cows/Player
- Burrows–Wheeler transform
C
- CRC-32
- CSV data manipulation
- CSV to HTML translation
- CUSIP
- Caesar cipher
- Calculating the value of e
- Calendar
- Calkin-Wilf sequence
- Call a foreign-language function
- Call a function
- Call a function in a shared library
- Camel case and snake case
- Canny edge detector
- Canonicalize CIDR
- Cantor set
- Card shuffles
- Carmichael 3 strong pseudoprimes
- Cartesian product of two or more lists
- Case-sensitivity of identifiers
- Casting out nines
- Catalan numbers
- Catalan numbers/Pascal's triangle
- Catamorphism
- Catmull–Clark subdivision surface
- Change e letters to i in words
- Changeable words
- Chaocipher
- Chaos game
- Chat server
- Chebyshev coefficients
- Check Machin-like formulas
- Check input device is a terminal
- Check output device is a terminal
- Checksumcolor
- Chemical calculator
- Chernick's Carmichael numbers
- Cheryl's birthday
- Chess player
- Chinese remainder theorem
- Chinese zodiac
- Cholesky decomposition
- Chowla numbers
- Church numerals
- Cipolla's algorithm
- Circles of given radius through two points
- Circular primes
- Cistercian numerals
- Closest-pair problem
- Closures/Value capture
- Code Golf: Code Golf
- Code segment unload
- Collect and sort square numbers in ascending order from three lists
- Color of a screen pixel
- Color quantization
- Color wheel
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Combinations and permutations
- Combinations with repetitions
- Comma quibbling
- Commatizing numbers
- Common list elements
- Common sorted list
- Compare a list of strings
- Compare length of two strings
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Conjugate a Latin verb
- Conjugate transpose
- Consecutive primes with ascending or descending differences
- Constrained random points on a circle
- Continued fraction
- Continued fraction/Arithmetic/Construct from rational number
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Convert decimal number to rational
- Convert seconds to compound duration
- Convex hull
- Coprime triplets
- Coprimes
- Copy stdin to stdout
- Count how many vowels and consonants occur in a string
- Count in factors
- Count in octal
- Count occurrences of a substring
- Count the coins
- Cousin primes
- Cramer's rule
- Create a file on magnetic tape
- Create a two-dimensional array at runtime
- Create an HTML table
- Create an object/Native demonstration
- Cuban primes
- Cubic special primes
- Cullen and Woodall numbers
- Currency
- Currying
- Cut a rectangle
- Cycle detection
- Cycles of a permutation
- Cyclotomic polynomial
D
- DNS query
- Damm algorithm
- Data Encryption Standard
- Date format
- Date manipulation
- Dating agency
- Day of the week
- Day of the week of Christmas and New Year
- Days between dates
- De Bruijn sequences
- Deal cards for FreeCell
- Death Star
- Decimal floating point number to binary
- Decision tables
- Deconvolution/1D
- Deconvolution/2D+
- Deming's Funnel
- Department numbers
- Determinant and permanent
- Determine if a string has all the same characters
- Determine if a string has all unique characters
- Determine if a string is collapsible
- Determine if a string is squeezable
- Determine if only one instance is running
- Determine if two triangles overlap
- Determine sentence type
- Dice game probabilities
- Digit fifth powers
- Digital root
- Digital root/Multiplicative digital root
- Dijkstra's algorithm
- Dinesman's multiple-dwelling problem
- Disarium numbers
- Discordian date
- Display a linear combination
- Display an outline as a nested table
- Distinct power numbers
- Distribution of 0 digits in factorial series
- Diversity prediction theorem
- Divide a rectangle into a number of unequal triangles
- Doomsday rule
- Dot product
- Dragon curve
- Draw a clock
- Draw a cuboid
- Draw a pixel
- Draw a rotating cube
- Draw a sphere
- Draw pixel 2
- Dutch national flag problem
E
- EKG sequence convergence
- Earliest difference between prime gaps
- Eban numbers
- Echo server
- Eertree
- Egyptian division
- Egyptian fractions
- Element-wise operations
- Elementary cellular automaton
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random Number Generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Emirp primes
- Empty directory
- Empty string
- Entropy
- Entropy/Narcissist
- Equilibrium index
- Erdős–Woods numbers
- Esthetic numbers
- Euclid-Mullin sequence
- Euler's identity
- Euler's sum of powers conjecture
- Euler method
- Evaluate binomial coefficients
- Even or odd
- Exactly three adjacent 3 in lists
- Exceptions/Catch an exception thrown in a nested call
- Executable library
- Execute CopyPasta Language
- Execute SNUSP
- Execute a Markov algorithm
- Exponentiation order
- Exponentiation with infix operators in (or operating on) the base
- Extensible prime generator
- External sort
- Extra primes
- Extract file extension
- Extreme floating point values
F
- FASTA format
- FTP
- Faces from a mesh
- Factorial base numbers indexing permutations of a collection
- Factorions
- Factors of a Mersenne number
- Fairshare between two and more
- Farey sequence
- Fast Fourier transform
- Faulhaber's formula
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fermat numbers
- Fibonacci heap
- Fibonacci n-step number sequences
- Fibonacci word
- Fibonacci word/fractal
- File extension is in extensions list
- File size distribution
- Find adjacent primes which differ by a square integer
- Find common directory path
- Find duplicate files
- Find first and last set bit of a long integer
- Find first missing positive
- Find if a point is within a triangle
- Find largest left truncatable prime in a given base
- Find minimum number of coins that make a given value
- Find palindromic numbers in both binary and ternary bases
- Find prime n such that reversed n is also prime
- Find prime numbers of the form n*n*n+2
- Find square difference
- Find squares n where n+1 is prime
- Find the intersection of a line with a plane
- Find the intersection of two lines
- Find the last Sunday of each month
- Find the missing permutation
- Find words which contains all the vowels
- Find words which contains more than 3 e vowels
- Find words whose first and last three letters are equal
- Find words with alternating vowels and consonants
- Finite state machine
- First 9 prime Fibonacci number
- First class environments
- First perfect square in base n with n unique digits
- First power of 2 that has leading decimal digits of 12
- Five weekends
- Fivenum
- Fixed length records
- Flipping bits game
- Floyd's triangle
- Floyd-Warshall algorithm
- Forest fire
- Fork
- Formal power series
- Formatted numeric output
- Fortunate numbers
- Four bit adder
- Four is magic
- Four is the number of letters in the ...
- Four sides of square
- Fractal tree
- Fraction reduction
- Fractran
- Free polyominoes enumeration
- Frobenius numbers
- Function frequency
- Functional coverage tree
- Fusc sequence
G
- GUI/Maximum window dimensions
- GUI component interaction
- GUI enabling/disabling of controls
- Galton box animation
- Gamma function
- Gapful numbers
- Gauss-Jordan matrix inversion
- Gaussian elimination
- General FizzBuzz
- Generate Chess960 starting position
- Generate lower case ASCII alphabet
- Generate random chess position
- Generate random numbers without repeating a value
- Geohash
- Geometric algebra
- Get system command output
- Getting the number of decimals
- Globally replace text in several files
- Go Fish
- Goldbach's comet
- Graph colouring
- Gray code
- Grayscale image
- Greyscale bars/Display
- Guess the number
- Guess the number/With feedback
- Guess the number/With feedback (player)
H
- HTTPS
- HTTPS/Authenticated
- HTTPS/Client-authenticated
- Hailstone sequence
- Halt and catch fire
- Hamming numbers
- Handle a signal
- Harmonic series
- Harshad or Niven series
- Hash join
- Haversine formula
- Hello world/Line printer
- Hello world/Newbie
- Hello world/Newline omission
- Hello world/Web server
- Here document
- Heronian triangles
- Hex words
- Hexapawn
- Hickerson series of almost integers
- Hilbert curve
- History variables
- Hofstadter-Conway $10,000 sequence
- Hofstadter Figure-Figure sequences
- Hofstadter Q sequence
- Holidays related to Easter
- Honeycombs
- Horizontal sundial calculations
- Hough transform
- Hourglass puzzle
- Huffman coding
- Humble numbers
- Hunt the Wumpus
I
- IBAN
- ISBN13 check digit
- I before E except after C
- Identity matrix
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Image convolution
- Image noise
- Imaginary base numbers
- Implicit type conversion
- Include a file
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Input/Output for lines of text
- Input/Output for pairs of numbers
- Input loop
- Integer overflow
- Integer roots
- Intersecting number wheels
- Inverted index
- Inverted syntax
- Isqrt (integer square root) of X
- Iterated digits squaring
J
K
- K-d tree
- K-means++ clustering
- Kahan summation
- Kaprekar numbers
- Kernighans large earthquake problem
- Keyboard input/Flush the keyboard buffer
- Keyboard input/Keypress check
- Keyboard input/Obtain a Y or N response
- Keyboard macros
- Category:Kivy
- Knapsack problem/0-1
- Knapsack problem/Bounded
- Knapsack problem/Continuous
- Knight's tour
- Knuth's algorithm S
- Knuth's power tree
- Koch curve
- Kolakoski sequence
- Kosaraju
- Kronecker product
- Kronecker product based fractals
L
- LU decomposition
- LZW compression
- Lah numbers
- Langton's ant
- Largest difference between adjacent primes
- Largest five adjacent number
- Largest int from concatenated ints
- Largest number divisible by its digits
- Largest palindrome product
- Largest prime factor
- Largest product in a grid
- Largest proper divisor of n
- Last Friday of each month
- Last letter-first letter
- Last list item
- Latin Squares in reduced form
- Law of cosines - triples
- Leap year
- Least common multiple
- Left factorials
- Length of an arc between two angles
- Leonardo numbers
- Letter frequency
- Levenshtein distance
- Levenshtein distance/Alignment
- Linear congruential generator
- Linux CPU utilization
- List rooted trees
- Literals/Floating point
- Category:Livewires
- Logistic curve fitting in epidemiology
- Long literals, with continuations
- Long multiplication
- Long primes
- Long stairs
- Long year
- Longest common prefix
- Longest common subsequence
- Longest common substring
- Longest common suffix
- Longest increasing subsequence
- Longest palindromic substrings
- Longest string challenge
- Longest substrings without repeating characters
- Loops/Continue
- Loops/Increment loop index within loop body
- Loops/With multiple ranges
- Loops/Wrong ranges
- Lucas-Lehmer test
- Lucky and even lucky numbers
- Ludic numbers
- Luhn test of credit card numbers
- Lychrel numbers
M
- MAC Vendor Lookup
- MD4
- MD5/Implementation
- Machine code
- Mad Libs
- Magic 8-ball
- Magic constant
- Magic squares of doubly even order
- Magic squares of odd order
- Magic squares of singly even order
- Main step of GOST 28147-89
- Make a backup file
- Make directory path
- Mandelbrot set
- Map range
- Markov chain text generator
- Mastermind
- Category:Matplotlib
- Matrix-exponentiation operator
- Matrix chain multiplication
- Matrix digital rain
- Matrix multiplication
- Matrix transposition
- Matrix with two diagonals
- Maximum difference between adjacent elements of list
- Maximum triangle path sum
- Mayan calendar
- Mayan numerals
- Maze generation
- Maze solving
- McNuggets problem
- Median filter
- Menu
- Merge and aggregate datasets
- Mersenne primes
- Mertens function
- Metallic ratios
- Metronome
- Mian-Chowla sequence
- Middle three digits
- Mind boggling card trick
- Minesweeper game
- Minimal steps down to 1
- Minimum multiple of m where digital sum equals m
- Minimum number of cells after, before, above and below NxN squares
- Minimum numbers of three lists
- Minimum positive multiple in base 10 using only 0 and 1
- Minkowski question-mark function
- Modified random distribution
- Modular arithmetic
- Modular exponentiation
- Modular inverse
- Modulinos
- Monads/List monad
- Monads/Maybe monad
- Monads/Writer monad
- Montgomery reduction
- Monty Hall problem
- Morse code
- Mosaic matrix
- Most frequent k chars distance
- Mouse position
- Move-to-front algorithm
- Multi-dimensional array
- Multifactorial
- Multiple regression
- Multiplicative order
- Multisplit
- Munchausen numbers
- Munching squares
- Musical scale
- Möbius function
N
- N'th
- N-body problem
- N-queens minimum and knights and bishops
- N-queens problem
- N-smooth numbers
- NYSIIS
- Names to numbers
- Naming conventions
- Narcissist
- Narcissistic decimal number
- Native shebang
- Natural sorting
- Nautical bell
- Negative base numbers
- Neighbour primes
- Nested function
- Nested templated data
- Next highest int from digits
- Next special primes
- Nim game
- Nimber arithmetic
- Non-continuous subsequences
- Non-transitive dice
- Nonoblock
- Nonogram solver
- Category:NumPy
- Number names
- Number reversal game
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers in base-16 representation that cannot be written with decimal digits
- Numbers in base 10 that are palindromic in bases 2, 4, and 16
- Numbers which binary and ternary digit sum are prime
- Numbers with equal rises and falls
- Numbers with same digit set in base 10 and base 16
- Numeric error propagation
- Numeric separator syntax
- Numerical and alphabetical suffixes
- Numerical integration/Adaptive Simpson's method
- Numerical integration/Gauss-Legendre Quadrature
O
- OLE automation
- Odd and square numbers
- Odd squarefree semiprimes
- Odd word problem
- Odd words
- Old Russian measure of length
- Old lady swallowed a fly
- One-time pad
- One of n lines in a file
- OpenGL
- OpenWebNet password
- Operator precedence
- Orbital elements
- Order by pair comparisons
- Order disjoint list items
- Order two numerical lists
- Ordered partitions
- Own digits power sum
P
- P-value correction
- Category:PIL
- Padovan n-step number sequences
- Padovan sequence
- Palindrome dates
- Palindromic gapful numbers
- Palindromic primes
- Pancake numbers
- Paraffins
- Parallel brute force
- Parallel calculations
- Parameterized SQL statement
- Parse an IP Address
- Parse command-line arguments
- Parsing/RPN calculator algorithm
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Particle swarm optimization
- Partition an integer x into n primes
- Partition function P
- Pascal's triangle/Puzzle
- Pascal matrix generation
- Password generator
- Pathological floating point problems
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Pentagram
- Perceptron
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Perfect shuffle
- Perfect totient numbers
- Perlin noise
- Permutation test
- Permutations
- Permutations/Derangements
- Permutations/Rank of a permutation
- Permutations by swapping
- Permutations with repetitions
- Permutations with some identical elements
- Pernicious numbers
- Phrase reversals
- Pi
- Pick random element
- Pierpont primes
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Display
- Pisano period
- Plasma effect
- Play recorded sounds
- Playfair cipher
- Plot coordinate pairs
- Poker hand analyser
- Polynomial regression
- Polynomial synthetic division
- Polyspiral
- Population count
- Positive decimal integers with the digit 1 occurring exactly twice
- Practical numbers
- Pragmatic directives
- Price fraction
- Price list behind API
- Primality by Wilson's theorem
- Prime conspiracy
- Prime numbers which contain 123
- Prime triplets
- Prime words
- Primes - allocate descendants to their ancestors
- Primes whose sum of digits is 25
- Primes with digits in nondecreasing order
- Primorial numbers
- Print debugging statement
- Print itself
- Priority queue
- Problem of Apollonius
- Product of divisors
- Program name
- Proper divisors
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/Middle-square method
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Splitmix64
- Pseudo-random numbers/Xorshift star
- Category:PyAutoGUI
- Category:PyGTK
- Category:PyQt
- Category:Pygame
- Pythagoras tree
- Pythagorean quadruples
- Pythagorean triples
- Category:Python Implementations
- Category:Python User
- Category:Python examples needing attention
- Category:Pythonwin
R
- RCRPG
- RIPEMD-160
- RPG attributes generator
- RSA code
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Ramsey's theorem
- Random Latin squares
- Random number generator (device)
- Random number generator (included)
- Random sentence from book
- Range consolidation
- Range expansion
- Range modifications
- Ranking methods
- Rare numbers
- Ray-casting algorithm
- Read a configuration file
- Read a file character by character/UTF8
- Read a file line by line
- Read a specific line from a file
- Readline interface
- Recaman's sequence
- Record sound
- Reduced row echelon form
- Reflection/Get source
- Reflection/List methods
- Reflection/List properties
- Regular expressions
- Remove lines from a file
- Remove vowels from a string
- Rep-string
- Repeat
- Resistance calculator
- Resistance network calculator
- Resistor mesh
- Retrieve and search chat history
- Return multiple values
- Reverse the gender of a string
- Reverse the order of lines in a text file while preserving the contents of each line
- Reverse words in a string
- Rock-paper-scissors
- Roman numerals/Decode
- Roman numerals/Encode
- Roots of a function
- Roots of a quadratic function
- Roots of unity
- Rosetta Code/Count examples
- Rosetta Code/Find bare lang tags
- Rosetta Code/Fix code tags
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Rank languages by popularity
- Run as a daemon or service
- Runge-Kutta method
S
- S-expressions
- SHA-1
- SHA-256
- SHA-256 Merkle tree
- SOAP
- SQL-based authentication
- Safe and Sophie Germain primes
- Safe primes and unsafe primes
- Sailors, coconuts and a monkey problem
- Same fringe
- Sattolo cycle
- Category:SciPy
- Scope/Function names and labels
- Search a list of records
- Search in paragraph's text
- Secure temporary file
- Self-describing numbers
- Self-hosting compiler
- Self numbers
- Semiprime
- Semordnilap
- Send email
- Separate the house number from the street name
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence: smallest number with exactly n divisors
- Sequence of non-squares
- Sequence of primes by trial division
- Sequence of primorial primes
- Set
- Set consolidation
- Set of real numbers
- Set puzzle
- Set right-adjacent bits
- Sexy primes
- Category:Shapely
- Shift list elements to left by 3
- Shoelace formula for polygonal area
- Shortest common supersequence
- Show ASCII table
- Show the (decimal) value of a number of 1s appended with a 3, then squared
- Show the epoch
- Sierpinski arrowhead curve
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle/Graphical
- Simple database
- Simple turtle graphics
- Simulate input/Keyboard
- Simulate input/Mouse
- Sine wave
- Singly-linked list/Element removal
- Sleeping Beauty problem
- Smallest enclosing circle problem
- Smallest multiple
- Smallest numbers
- Smallest power of 6 whose decimal expansion contains n
- Smallest square that begins with n
- Smarandache prime-digital sequence
- Smith numbers
- Snake
- Snake and Ladder
- Sockets
- Sokoban
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Solve equations with substitution method
- Solve the no connection puzzle
- Solve triangle solitare puzzle
- Sort a list of object identifiers
- Sort an outline at every level
- Sort disjoint sublist
- Sort numbers lexicographically
- Sort primes from list to a list
- Sort stability
- Sort the letters of string in alphabetical order
- Sort three variables
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Bead sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Cycle sort
- Sorting algorithms/Pancake sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Sleep sort
- Sorting algorithms/Stooge sort
- Sorting algorithms/Strand sort
- Soundex
- Sparkline in unicode
- Special factorials
- Special neighbor primes
- Special pythagorean triplet
- Special variables
- Speech synthesis
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Split a character string based on change of character
- Square-free integers
- Square but not cube
- Stable marriage problem
- Stack traces
- State name puzzle
- Statistics/Basic
- Statistics/Normal distribution
- Steady squares
- Stem-and-leaf plot
- Stern-Brocot sequence
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Straddling checkerboard
- Strange numbers
- Strange plus numbers
- Strange unique prime triplets
- Strassen's algorithm
- Stream merge
- String append
- String comparison
- String concatenation
- String prepend
- Strip a set of characters from a string
- Strip block comments
- Strip comments from a string
- Strip control codes and extended characters from a string
- Strip whitespace from a string/Top and tail
- Strong and weak primes
- Subleq
- Subset sum problem
- Substitution cipher
- Substring/Top and tail
- Subtractive generator
- Successive prime differences
- Sudoku
- Suffix tree
- Suffixation of decimal numbers
- Sum and product puzzle
- Sum digits of an integer
- Sum multiples of 3 and 5
- Sum of divisors
- Sum of elements below main diagonal of matrix
- Sum of first n cubes
- Sum of square and cube digits of an integer are primes
- Sum of the digits of n is substring of n
- Sum of two adjacent numbers are primes
- Sum to 100
- Summarize and say sequence
- Summarize primes
- Summation of primes
- Sunflower fractal
- Super-d numbers
- Superellipse
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping
- Sylvester's sequence
T
- Table creation
- Table creation/Postal addresses
- Tarjan
- Tau function
- Tau number
- Taxicab numbers
- Teacup rim text
- Temperature conversion
- Terminal control/Clear the screen
- Terminal control/Coloured text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Dimensions
- Terminal control/Display an extended character
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Preserve screen
- Terminal control/Unicode output
- Ternary logic
- Test integerness
- Tetris
- Text between
- Text processing/1
- Text processing/2
- Textonyms
- The ISAAC Cipher
- The Name Game
- The Twelve Days of Christmas
- The sieve of Sundaram
- Thiele's interpolation formula
- Thue-Morse
- Tic-tac-toe
- Category:Tkinter
- Tokenize a string with escaping
- Tonelli-Shanks algorithm
- Topic variable
- Topological sort/Extracted top item
- Topswops
- Total circles area
- Totient function
- Trabb Pardo–Knuth algorithm
- Tree datastructures
- Tree from nesting levels
- Triplet of three numbers
- Tropical algebra overloading
- Truncatable primes
- Truncate a file
- Truth table
- Twelve statements
- Twin primes
- Two bullet roulette
- Two identical strings
- Two sum
- Type detection
U
- UPC
- URL decoding
- URL encoding
- URL parser
- URL shortener
- UTF-8 encode and decode
- Ulam numbers
- Ulam spiral (for primes)
- Unbias a random generator
- Unicode strings
- Unicode variable names
- Unique characters
- Unique characters in each string
- Universal Turing machine
- Unix/ls
- Uno (Card Game)
- Unprimeable numbers
- Update a configuration file
- Use a REST API
- Use another language to call a function
- User input/Graphical
- User input/Text
V
- Category:VPython
- Validate International Securities Identification Number
- Vampire number
- Van Eck sequence
- Van der Corput sequence
- Variable-length quantity
- Variable declaration reset
- Vector
- Vector products
- Verhoeff algorithm
- Verify distribution uniformity/Chi-squared test
- Verify distribution uniformity/Naive
- Vibrating rectangles
- Video display modes
- Vigenère cipher
- Vigenère cipher/Cryptanalysis
- Visualize a tree
- Vogel's approximation method
- Voronoi diagram
W
- War card game
- Water collected between towers
- Weird numbers
- Welch's t-test
- Wieferich primes
- Window creation/X11
- Window management
- Wireworld
- Word break problem
- Word frequency
- Word ladder
- Word search
- Word wheel
- Word wrap
- Wordiff
- Wordle comparison
- Words containing "the" substring
- Words from neighbour ones
- World Cup group stage
- Write entire file
- Write float arrays to a text file
- Write language name in 3D ASCII
- Write to Windows event log
- Category:WxPython
Done in Java but not E[edit]
A
- A* search algorithm
- A+B
- ABC problem
- ABC words
- AKS test for primes
- ASCII art diagram converter
- AVL tree
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abundant, deficient and perfect number classifications
- Abundant odd numbers
- Active Directory/Connect
- Active Directory/Search for a user
- Addition chains
- Additive primes
- Air mass
- Aliquot sequence classifications
- Almost prime
- Alternade words
- Amicable pairs
- Anagrams/Deranged anagrams
- Angle difference between two bearings
- Angles (geometric), normalization and conversion
- Anonymous recursion
- Anti-primes
- Append a record to the end of a text file
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Archimedean spiral
- Arithmetic-geometric mean
- Arithmetic-geometric mean/Calculate Pi
- Arithmetic/Complex
- Arithmetic/Rational
- Arithmetic coding/As a generalized change of radix
- Array length
- Aspect oriented programming
- Assertions in design by contract
- Associative array/Merging
- Attractive numbers
- Audio alarm
- Average loop length
- Averages/Mean angle
- Averages/Mean time of day
B
- Babbage problem
- Bacon cipher
- Balanced brackets
- Balanced ternary
- Barnsley fern
- Base58Check encoding
- Base64 decode data
- Base64 encode data
- Bell numbers
- Benford's law
- Bernoulli numbers
- Best shuffle
- Bilinear interpolation
- Bin given limits
- Binary digits
- Bioinformatics/Sequence mutation
- Bioinformatics/base count
- Birthday problem
- Bitcoin/address validation
- Bitmap/Histogram
- Bitmap/Midpoint circle algorithm
- Boids
- Box the compass
- Brace expansion
- Brazilian numbers
- Brownian tree
- Bulls and cows/Player
- Burrows–Wheeler transform
C
- CRC-32
- CSV data manipulation
- CSV to HTML translation
- CUSIP
- Caesar cipher
- Calculating the value of e
- Calendar
- Call a foreign-language function
- Call a function
- Call a function in a shared library
- Canny edge detector
- Canonicalize CIDR
- Cantor set
- Card shuffles
- Carmichael 3 strong pseudoprimes
- Cartesian product of two or more lists
- Case-sensitivity of identifiers
- Casting out nines
- Catalan numbers
- Catalan numbers/Pascal's triangle
- Catamorphism
- Changeable words
- Chaocipher
- Chaos game
- Chat server
- Chebyshev coefficients
- Check Machin-like formulas
- Chemical calculator
- Chernick's Carmichael numbers
- Cheryl's birthday
- Chinese remainder theorem
- Chinese zodiac
- Cholesky decomposition
- Chowla numbers
- Church numerals
- Cipolla's algorithm
- Circles of given radius through two points
- Circular primes
- Cistercian numerals
- Closest-pair problem
- Closures/Value capture
- Code segment unload
- Color of a screen pixel
- Color wheel
- Colorful numbers
- Colour bars/Display
- Colour pinstripe/Display
- Combinations and permutations
- Combinations with repetitions
- Comma quibbling
- Commatizing numbers
- Compare a list of strings
- Compare length of two strings
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Constrained random points on a circle
- Continued fraction
- Continued fraction/Arithmetic/Construct from rational number
- Convert decimal number to rational
- Convert seconds to compound duration
- Convex hull
- Copy stdin to stdout
- Count in factors
- Count in octal
- Count occurrences of a substring
- Count the coins
- Cramer's rule
- Create a file on magnetic tape
- Create a two-dimensional array at runtime
- Create an HTML table
- Create an object/Native demonstration
- Cuban primes
- Currency
- Currying
- Cut a rectangle
- Cycle detection
- Cyclotomic polynomial
D
- DNS query
- Damm algorithm
- Data Encryption Standard
- Date format
- Date manipulation
- Day of the week
- Days between dates
- De Bruijn sequences
- Deal cards for FreeCell
- Death Star
- Decimal floating point number to binary
- Decision tables
- Deconvolution/1D
- Deming's Funnel
- Department numbers
- Determinant and permanent
- Determine if a string has all the same characters
- Determine if a string has all unique characters
- Determine if a string is collapsible
- Determine if a string is squeezable
- Determine if only one instance is running
- Determine if two triangles overlap
- Dice game probabilities
- Digital root
- Digital root/Multiplicative digital root
- Dijkstra's algorithm
- Dinesman's multiple-dwelling problem
- Discordian date
- Display a linear combination
- Diversity prediction theorem
- Doomsday rule
- Dot product
- Dragon curve
- Draw a clock
- Draw a cuboid
- Draw a pixel
- Draw a rotating cube
- Draw a sphere
- Dutch national flag problem
E
- EKG sequence convergence
- Earliest difference between prime gaps
- Eban numbers
- Echo server
- Eertree
- Egyptian division
- Egyptian fractions
- Element-wise operations
- Elementary cellular automaton
- Elliptic curve arithmetic
- Emirp primes
- Empty directory
- Empty string
- Entropy
- Entropy/Narcissist
- Equilibrium index
- Erdös-Selfridge categorization of primes
- Erdős-primes
- Esthetic numbers
- Euler's identity
- Euler's sum of powers conjecture
- Euler method
- Evaluate binomial coefficients
- Even or odd
- Exceptions/Catch an exception thrown in a nested call
- Executable library
- Execute CopyPasta Language
- Execute SNUSP
- Execute a Markov algorithm
- Exponentiation order
- Extensible prime generator
- Extra primes
- Extract file extension
- Extreme floating point values
F
- FASTA format
- FTP
- Factorions
- Factors of a Mersenne number
- Fairshare between two and more
- Farey sequence
- Fast Fourier transform
- Faulhaber's formula
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fermat numbers
- Fibonacci matrix-exponentiation
- Fibonacci n-step number sequences
- Fibonacci word
- Fibonacci word/fractal
- File extension is in extensions list
- Find common directory path
- Find duplicate files
- Find first and last set bit of a long integer
- Find if a point is within a triangle
- Find largest left truncatable prime in a given base
- Find palindromic numbers in both binary and ternary bases
- Find the intersection of a line with a plane
- Find the intersection of two lines
- Find the last Sunday of each month
- Find the missing permutation
- Finite state machine
- First 9 prime Fibonacci number
- First perfect square in base n with n unique digits
- First power of 2 that has leading decimal digits of 12
- Five weekends
- Fivenum
- Flipping bits game
- Floyd's triangle
- Floyd-Warshall algorithm
- Forest fire
- Fork
- Formal power series
- Formatted numeric output
- Four bit adder
- Four is magic
- Four is the number of letters in the ...
- Fractal tree
- Fraction reduction
- Fractran
- Free polyominoes enumeration
- Frobenius numbers
- Fusc sequence
G
- GUI/Maximum window dimensions
- GUI component interaction
- GUI enabling/disabling of controls
- Galton box animation
- Gamma function
- Gapful numbers
- Gauss-Jordan matrix inversion
- Gaussian elimination
- General FizzBuzz
- Generalised floating point addition
- Generate Chess960 starting position
- Generate lower case ASCII alphabet
- Generate random chess position
- Generate random numbers without repeating a value
- Geometric algebra
- Get system command output
- Getting the number of decimals
- Globally replace text in several files
- Go Fish
- Gray code
- Grayscale image
- Greed
- Greyscale bars/Display
- Guess the number
- Guess the number/With feedback
- Guess the number/With feedback (player)
H
- HTTPS
- Hailstone sequence
- Hamming numbers
- Handle a signal
- Harshad or Niven series
- Hash join
- Haversine formula
- Hello world/Line printer
- Hello world/Newbie
- Hello world/Newline omission
- Hello world/Web server
- Heronian triangles
- Hickerson series of almost integers
- Hilbert curve
- History variables
- Hofstadter-Conway $10,000 sequence
- Hofstadter Figure-Figure sequences
- Hofstadter Q sequence
- Holidays related to Easter
- Honeycombs
- Horizontal sundial calculations
- Hough transform
- Huffman coding
- Humble numbers
- Hunt the Wumpus
I
- IBAN
- ISBN13 check digit
- I before E except after C
- Identity matrix
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Image convolution
- Image noise
- Imaginary base numbers
- Implicit type conversion
- Include a file
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Input/Output for lines of text
- Input/Output for pairs of numbers
- Input loop
- Integer overflow
- Integer roots
- Intersecting number wheels
- Inverted index
- Inverted syntax
- Isqrt (integer square root) of X
- Iterated digits squaring
J
K
- K-d tree
- K-means++ clustering
- Kahan summation
- Kaprekar numbers
- Kernighans large earthquake problem
- Keyboard input/Keypress check
- Keyboard macros
- Knapsack problem/0-1
- Knapsack problem/Bounded
- Knapsack problem/Continuous
- Knight's tour
- Knuth's algorithm S
- Knuth's power tree
- Kolakoski sequence
- Kosaraju
- Kronecker product
- Kronecker product based fractals
L
- LU decomposition
- LZW compression
- Lah numbers
- Langton's ant
- Largest int from concatenated ints
- Largest number divisible by its digits
- Last Friday of each month
- Last letter-first letter
- Latin Squares in reduced form
- Law of cosines - triples
- Leap year
- Least common multiple
- Left factorials
- Legendre prime counting function
- Length of an arc between two angles
- Leonardo numbers
- Letter frequency
- Levenshtein distance
- Levenshtein distance/Alignment
- Line circle intersection
- Linear congruential generator
- Linux CPU utilization
- List rooted trees
- Literals/Floating point
- Logistic curve fitting in epidemiology
- Long multiplication
- Long primes
- Long year
- Longest common prefix
- Longest common subsequence
- Longest common substring
- Longest common suffix
- Longest increasing subsequence
- Longest string challenge
- Loops/Continue
- Loops/Increment loop index within loop body
- Loops/With multiple ranges
- Loops/Wrong ranges
- Lucas-Lehmer test
- Lucky and even lucky numbers
- Ludic numbers
- Luhn test of credit card numbers
- Lychrel numbers
M
- MAC Vendor Lookup
- MD4
- MD5/Implementation
- Mad Libs
- Magic 8-ball
- Magic squares of doubly even order
- Magic squares of odd order
- Magic squares of singly even order
- Magnanimous numbers
- Make a backup file
- Make directory path
- Mandelbrot set
- Map range
- Markov chain text generator
- Matrix chain multiplication
- Matrix multiplication
- Matrix transposition
- Matrix with two diagonals
- Maximum triangle path sum
- Mayan numerals
- Maze generation
- Maze solving
- McNuggets problem
- Menu
- Mersenne primes
- Mertens function
- Metallic ratios
- Metronome
- Mian-Chowla sequence
- Middle three digits
- Minesweeper game
- Minimal steps down to 1
- Minimum positive multiple in base 10 using only 0 and 1
- Modular arithmetic
- Modular exponentiation
- Modular inverse
- Modulinos
- Montgomery reduction
- Monty Hall problem
- Morpion solitaire
- Morse code
- Most frequent k chars distance
- Mouse position
- Move-to-front algorithm
- Multi-dimensional array
- Multifactorial
- Multiple regression
- Multiplicative order
- Multisplit
- Munchausen numbers
- Munching squares
- Möbius function
N
- N'th
- N-body problem
- N-queens problem
- N-smooth numbers
- NYSIIS
- Narcissist
- Narcissistic decimal number
- Nautical bell
- Negative base numbers
- Nested function
- Next highest int from digits
- Next special primes
- Nice primes
- Nim game
- Nimber arithmetic
- Non-continuous subsequences
- Non-transitive dice
- Nonoblock
- Nonogram solver
- Number names
- Number reversal game
- Numbers with equal rises and falls
- Numbers with prime digits whose sum is 13
- Numeric error propagation
- Numeric separator syntax
- Numerical integration/Adaptive Simpson's method
- Numerical integration/Gauss-Legendre Quadrature
O
P
- P-value correction
- Palindrome dates
- Palindromic gapful numbers
- Pancake numbers
- Paraffins
- Parallel brute force
- Parallel calculations
- Parameterized SQL statement
- Parse an IP Address
- Parsing/RPN calculator algorithm
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Particle swarm optimization
- Partition an integer x into n primes
- Partition function P
- Pascal's triangle/Puzzle
- Pascal matrix generation
- Password generator
- Pathological floating point problems
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Penrose tiling
- Pentagram
- Pentomino tiling
- Perceptron
- Perfect shuffle
- Perfect totient numbers
- Perlin noise
- Permutation test
- Permutations
- Permutations/Derangements
- Permutations/Rank of a permutation
- Permutations by swapping
- Permutations with repetitions
- Permuted multiples
- Pernicious numbers
- Phrase reversals
- Pi
- Pick random element
- Pierpont primes
- Pig the dice game
- Pig the dice game/Player
- Pinstripe/Display
- Pisano period
- Plasma effect
- Playfair cipher
- Plot coordinate pairs
- Poker hand analyser
- Polynomial regression
- Polynomial synthetic division
- Polyspiral
- Population count
- Powerful numbers
- Practical numbers
- Price fraction
- Primality by Wilson's theorem
- Prime conspiracy
- Prime triangle
- Primes - allocate descendants to their ancestors
- Primes whose sum of digits is 25
- Primorial numbers
- Print debugging statement
- Priority queue
- Problem of Apollonius
- Product of divisors
- Program name
- Proper divisors
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Xorshift star
- Pseudorandom number generator image
- Pythagoras tree
- Pythagorean quadruples
- Pythagorean triples
R
- RCRPG
- RIPEMD-160
- RPG attributes generator
- RSA code
- Railway circuit
- Ramanujan's constant
- Ramanujan primes
- Ramer-Douglas-Peucker line simplification
- Ramsey's theorem
- Random Latin squares
- Random number generator (device)
- Random number generator (included)
- Range consolidation
- Range expansion
- Ranking methods
- Rare numbers
- Ray-casting algorithm
- Read a configuration file
- Read a file character by character/UTF8
- Read a file line by line
- Read a specific line from a file
- Readline interface
- Recaman's sequence
- Reduced row echelon form
- Reflection/Get source
- Reflection/List methods
- Reflection/List properties
- Regular expressions
- Remove lines from a file
- Remove vowels from a string
- Rep-string
- Repeat
- Resistor mesh
- Return multiple values
- Reverse the gender of a string
- Reverse words in a string
- Rhonda numbers
- Robots
- Rock-paper-scissors
- Roman numerals/Decode
- Roman numerals/Encode
- Roots of a function
- Roots of a quadratic function
- Roots of unity
- Rosetta Code/Count examples
- Rosetta Code/Find bare lang tags
- Rosetta Code/Fix code tags
- Rosetta Code/Rank languages by popularity
- Rosetta Code/Tasks without examples
- Runge-Kutta method
S
- S-expressions
- SHA-1
- SHA-256
- SHA-256 Merkle tree
- SQL-based authentication
- Safe primes and unsafe primes
- Sailors, coconuts and a monkey problem
- Same fringe
- Sattolo cycle
- Search a list of records
- Secure temporary file
- Selective file copy
- Self-describing numbers
- Self numbers
- Semiprime
- Semordnilap
- Send email
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence: smallest number with exactly n divisors
- Sequence of non-squares
- Sequence of primes by trial division
- Sequence of primorial primes
- Set
- Set consolidation
- Set of real numbers
- Set puzzle
- Sexy primes
- Shift list elements to left by 3
- Shoelace formula for polygonal area
- Shortest common supersequence
- Show ASCII table
- Show the epoch
- Sierpinski curve
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle/Graphical
- Simple database
- Simulate input/Keyboard
- Simulate input/Mouse
- Smarandache prime-digital sequence
- Smith numbers
- Snake
- Snake and Ladder
- Sockets
- Sokoban
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Solve the no connection puzzle
- Solve triangle solitare puzzle
- Sort a list of object identifiers
- Sort disjoint sublist
- Sort numbers lexicographically
- Sort stability
- Sort three variables
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Bead sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Cycle sort
- Sorting algorithms/Pancake sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Sleep sort
- Sorting algorithms/Stooge sort
- Sorting algorithms/Strand sort
- Sorting algorithms/Tree sort on a linked list
- Soundex
- Sparkline in unicode
- Special variables
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Split a character string based on change of character
- Square-free integers
- Square but not cube
- Square root by hand
- Stable marriage problem
- Stack traces
- State name puzzle
- Statistics/Basic
- Statistics/Normal distribution
- Stem-and-leaf plot
- Stern-Brocot sequence
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Straddling checkerboard
- Strange numbers
- Strange plus numbers
- Strange unique prime triplets
- Stream merge
- String append
- String comparison
- String concatenation
- String prepend
- Strip a set of characters from a string
- Strip block comments
- Strip comments from a string
- Strip control codes and extended characters from a string
- Strip whitespace from a string/Top and tail
- Strong and weak primes
- Subleq
- Subset sum problem
- Substitution cipher
- Substring/Top and tail
- Subtractive generator
- Successive prime differences
- Sudoku
- Suffix tree
- Sum and product puzzle
- Sum data type
- Sum digits of an integer
- Sum multiples of 3 and 5
- Sum of divisors
- Sum to 100
- Summarize and say sequence
- Super-d numbers
- Superellipse
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping
T
- Tau function
- Tau number
- Taxicab numbers
- Teacup rim text
- Temperature conversion
- Terminal control/Clear the screen
- Terminal control/Display an extended character
- Terminal control/Preserve screen
- Ternary logic
- Test integerness
- Tetris
- Text between
- Text completion
- Text processing/1
- Text processing/2
- Textonyms
- The ISAAC Cipher
- The Name Game
- The Twelve Days of Christmas
- Thiele's interpolation formula
- Thue-Morse
- Tic-tac-toe
- Tokenize a string with escaping
- Tonelli-Shanks algorithm
- Topological sort/Extracted top item
- Topswops
- Total circles area
- Totient function
- Trabb Pardo–Knuth algorithm
- Transportation problem
- Truncatable primes
- Truncate a file
- Truth table
- Twelve statements
- Twin primes
- Two identical strings
- Two sum
- Type detection
U
- UPC
- URL decoding
- URL encoding
- URL parser
- UTF-8 encode and decode
- Ulam numbers
- Ulam spiral (for primes)
- Unbias a random generator
- Unicode strings
- Unicode variable names
- Universal Turing machine
- Unix/ls
- Unprimeable numbers
- Update a configuration file
- Use a REST API
- Use another language to call a function
- User input/Graphical
- User input/Text
V
- Validate International Securities Identification Number
- Vampire number
- Van Eck sequence
- Van der Corput sequence
- Variable-length quantity
- Variable declaration reset
- Vector
- Vector products
- Verify distribution uniformity/Chi-squared test
- Verify distribution uniformity/Naive
- Vigenère cipher
- Vigenère cipher/Cryptanalysis
- Visualize a tree
- Vogel's approximation method
- Voronoi diagram
W
- Water collected between towers
- Weird numbers
- Welch's t-test
- Wieferich primes
- WiktionaryDumps to words
- Wilson primes of order n
- Window creation/X11
- Window management
- Wireworld
- Word break problem
- Word frequency
- Word ladder
- Word search
- Word wrap
- Words from neighbour ones
- World Cup group stage
- Write entire file
- Write float arrays to a text file
- Write language name in 3D ASCII
- Write to Windows event log
