Floyd's triangle: Difference between revisions
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</pre>
=={{header|RPL}}==
HP-28 display has 4 lines only, so the task must be run on an HP-48 or greater to achieve n=5, with the advantage of benefitting from additional instructions: <code>INCR</code> increments a variable and returns its updated value and <code>FREEZE</code> acts as a <code>DO UNTIL KEY END</code> loop.
n=14 is out of reach for HP-48+, since only capable of displaying 22 characters per line.
{| class="wikitable"
! RPL code
! Comment
|-
|
≪
0 → c
≪ CLLCD 1 5 '''FOR''' line
"" '''DO'''
'''IF''' c 9 < '''THEN''' " " + '''END'''
'c' INCR →STR + " " +
'''UNTIL''' line DUP 1 + * 2 / c == '''END'''
line DISP
'''NEXT''' 3 FREEZE
≫ ≫ ‘'''FLOYD'''’ STO
|
'''FLOYD''' ''( -- )''
initialize counter
clear screen, for line=1 to 5
initialize output string, loop
if counter<9 then add one space
increment counter and put it in string
until line*(line+1)/2 == counter
display string
freeze screen until key pressed
.
|}
====Output====
[https://aerobarfilms.files.wordpress.com/2023/04/hp-48-floyds-triangle-1-15.png Screenshot from HP-48 emulator]
=={{header|Ruby}}==
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