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#include <math.h> double pow(double x, double y); |
This function computes x^y, x raised to the power y.
x raised to the power y. If the result overflows a
double
or underflows, errno
is set to ERANGE
. If
y is NaN
, the return value is NaN
and errno
is set to EDOM
. If x and y are both 0, the return
value is 1, but errno
is set to EDOM
. If y is a
positive or a negative Infinity, the following results are returned,
depending on the value of x:
NaN
and errno
is set to EDOM
.
+Inf
-Inf
-Inf
+Inf
+Inf
.
NaN
and errno
is set to EDOM
.
ANSI/ISO C | C89; C99 |
POSIX | 1003.2-1992; 1003.1-2001 |
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