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# OpenDarwin 7.2.1 - man page for pow (opendarwin section 3)

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 ```POW(3) BSD Library Functions Manual POW(3) NAME pow -- power function SYNOPSIS #include double pow(double x, double y); DESCRIPTION The pow() functions compute x raised to the power y. SPECIAL VALUES pow(+-0, y) returns +-infinity and raises the "divide-by-zero" floating-point exception for y an odd integer < 0. pow(+-0, y) returns +infinity and raises the "divide-by-zero" floating-point exception for y < 0 and not an odd integer. pow(+-0, y) returns +-0 for y an odd integer > 0. pow(+-0, y) returns +0 for y > 0 and not an odd integer. pow(-1, +-infinity) returns 1. pow(1, y) returns 1 for any y, even a NaN. pow(x, +-0) returns 1 for any x, even a NaN. pow(x, y) returns a NaN and raises the "invalid" floating-point exception for finite x < 0 and finite non-integer y. pow(x, -infinity) returns +infinity for |x| < 1. pow(x, -infinity) returns +0 for |x| > 1. pow(x, +infinity) returns +0 for |x| < 1. pow(x, +infinity) returns +infinity for |x| > 1. pow(-infinity, y) returns -0 for y an odd integer < 0. pow(-infinity, y) returns +0 for y < 0 and not an odd integer. pow(-infinity, y) returns -infinity for y an odd integer > 0. pow(-infinity, y) returns +infinity for y > 0 and not an odd integer. pow(+infinity, y) returns +0 for y < 0. pow(+infinity, y) returns +infinity for y > 0. A domain error occurs if x is finite and negative and y is finite and not an integer. A domain error can occur if x is 0 and y less than or equal to 0. Range errors may occur. SEE ALSO math(3), infnan(3) STANDARDS The pow() function conforms to ISO/IEC 9899:1999(E). 4th Berkeley Distribution July 12, 2003 4th Berkeley Distribution```
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