NAME
pow, powf —
power functions
LIBRARY
library “libm”
SYNOPSIS
#include
<math.h>
double
pow(double
x, double y);
float
powf(float
x, float y);
DESCRIPTION
Thepow()
family of functions returns x raised to the power of
y.
If x is negative and y
is not an integer, the global variable errno is set to
EDOM, and on VAX a reserved operand fault is
generated. A portable application should nevertheless ensure that
y is an integer value whenever x
is negative.
RETURN VALUES
Upon successful completion, the described functions return x^y.
SEE ALSO
STANDARDS
The described functions conform to ISO/IEC 9899:1999 (“ISO C99”).
HISTORY
The history of the power functions dates back to Version 6 AT&T UNIX.