pow(3) - NetBSD Manual Pages

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POW(3)                  NetBSD 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 return 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 porta-
     ble 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.

NetBSD 6.0.2                  September 13, 2011                  NetBSD 6.0.2