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POW(3) BSD Library Functions Manual POW(3)
pow, powf -- power functions
Math Library (libm, -lm)
pow(double x, double y);
powf(float x, float y);
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 portable application should nevertheless
ensure that y is an integer value whenever x is negative.
Upon successful completion, the described functions return x^y.
The described functions conform to ISO/IEC 9899:1999 (``ISO C99'').
The history of the power functions dates back to Version 6 AT&T UNIX.
BSD September 13, 2011 BSD
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