NAME

pow, powf, powl — power functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
pow(double x, double y);

float
powf(float x, float y);

long double
powl(long double x, long double y);

DESCRIPTION

The pow() 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

exp(3), log(3)

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.