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Exponentiation with infix operators in (or operating on) the base: Difference between revisions
Exponentiation with infix operators in (or operating on) the base (view source)
Revision as of 19:38, 7 December 2020
, 3 years ago→{{header|Smalltalk}}: added Sorry for the output to look different; but it does not really make sense here
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(→{{header|Smalltalk}}: added Sorry for the output to look different; but it does not really make sense here) |
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+5**3 == 125; -+5**3 ==-125; -(+5)**3 ==-125; (-+5)**3 ==-125; -(+5**3) ==-125</pre>
=={{header|Smalltalk}}==
Smalltalk has no prefix operator for negation. To negate, you have to send the number a "negated" message, which has higher precedence than any binary message. Literal constants may have a sign (which is not an operation, but part of the constant).
<lang smalltalk>
a := 2.
b := 3.
Transcript show:'-5**2 => '; showCR: -5**2.
Transcript show:'-5**a => '; showCR: -5**a.
Transcript show:'-5**b => '; showCR: -5**b.
Transcript show:'5**2 => '; showCR: 5**2.
Transcript show:'5**a => '; showCR: 5**a.
Transcript show:'5**b => '; showCR: 5**b.
" Transcript show:'-(5**b) => '; showCR: -(5**b). -- invalid: syntax error "
" Transcript show:'5**-b => '; showCR: 5**-b. -- invalid: syntax error "</lang>
Using the "negated" message:
<lang smalltalk>
Transcript show:'5 negated**2 => '; showCR: 5 negated**2. "negates 5"
Transcript show:'5 negated**3 => '; showCR: 5 negated**3.
Transcript show:'5**2 negated => '; showCR: 5**2 negated. "negates 2"
Transcript show:'5**3 negated => '; showCR: 5**3 negated. "negates 3"
Transcript show:'5 negated**a => '; showCR: 5 negated**a.
Transcript show:'5 negated**b => '; showCR: 5 negated**b.
Transcript show:'5**a negated => '; showCR: 5**a negated.
Transcript show:'5**b negated => '; showCR: 5**b negated.
Transcript show:'(5**a) negated => '; showCR: (5**a) negated.
Transcript show:'(5**b) negated => '; showCR: (5**b) negated.
Transcript show:'(-5**a) negated => '; showCR: (-5**a) negated.
Transcript show:'(-5**b) negated => '; showCR: (-5**b) negated.
Transcript show:'-5 negated**2 => '; showCR: -5 negated**2. "negates the negative 5"
Transcript show:'-5 negated**3 => '; showCR: -5 negated**3.
</lang>
{{out}}
<pre>
-5**2 => 25
-5**a => 25
-5**b => -125
5**2 => 25
5**a => 25
5**b => 125
5 negated**2 => 25
5 negated**3 => -125
5**2 negated => (1/25)
5**3 negated => (1/125)
5 negated**a => 25
5 negated**b => -125
5**a negated => (1/25)
5**b negated => (1/125)
(5**a) negated => -25
(5**b) negated => -125
(-5**a) negated => -25
(-5**b) negated => 125
-5 negated**2 => 25
-5 negated**3 => 125
</pre>
=={{header|Wren}}==
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