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FABS(3) Library Functions Manual FABS(3) NAME fabs, fabsf, fabsl - floating-point absolute value functions LIBRARY Math Library (libm, -lm) SYNOPSIS #include <math.h> double fabs(double x); float fabsf(float x); long double fabsl(long double x); DESCRIPTION The fabs(), fabsf() and fabsl() functions compute the absolute value of a floating-point number x. RETURN VALUES Functions of the fabs() family return the absolute value of x. SEE ALSO abs(3), ceil(3), floor(3), math(3), rint(3) STANDARDS The fabs() function conforms to ANSI X3.159-1989 ("ANSI C89"). The fabsf() and fabsl() functions conform to ISO/IEC 9899:1999 ("ISO C99"). NetBSD 10.99 March 17, 2016 NetBSD 10.99