POW(3)

POW(3) | Library Functions Manual | POW(3)

# NAME

`pow`, `powf` —
power functions

# LIBRARY

Math Library (libm, -lm)

# SYNOPSIS

`#include <math.h>`

double
`pow`(double x, double y);

float
`powf`(float x, float 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.

September 13, 2011 | NetBSD 10.1