Handbook
Glossary
^ ( x y -- x^y )
Factor handbook
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»
Numbers
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Mathematical functions
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Powers and logarithms
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logn ( x n -- y )
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e^ ( x -- e^x )
Vocabulary
math.functions
Inputs
x
a
number
y
a
number
Outputs
x^y
a
number
Word description
Raises
x
to the power of
y
. If
y
is an integer the answer is computed exactly, otherwise a floating point approximation is used.
Errors
Throws an error if
x
and
y
are both integer 0.
Definition
USING:
combinators
kernel
math
math.functions.private
math.libm
;
IN:
math.functions
:
^
( x y -- x^y )
{
{
[
over
zero?
]
[
0^
]
}
{
[
dup
integer?
]
[
^integer
]
}
{
[
2dup
real^?
]
[
[
>float
]
bi@
fpow
]
}
[
^complex
]
}
cond
;
inline