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FDIM(3) FreeBSD Library Functions Manual FDIM(3)
NAME
fdim, fdimf, fdiml - positive difference functions
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
fdim(double x, double y);
float
fdimf(float x, float y);
long double
fdiml(long double x, long double y);
DESCRIPTION
The fdim(), fdimf(), and fdiml() functions return the positive difference
between x and y. That is, if x-y is positive, then x-y is returned. If
either x or y is an NaN, then an NaN is returned. Otherwise, the result
is +0.0.
Overflow or underflow may occur if the exact result is not representable
in the return type. No other exceptions are raised.
SEE ALSO
fabs(3), fmax(3), fmin(3), math(3)
STANDARDS
The fdim(), fdimf(), and fdiml() functions conform to ISO/IEC 9899:1999
("ISO C99").
HISTORY
These routines first appeared in FreeBSD 5.3.
FreeBSD 14.0-RELEASE-p6 June 29, 2004 FreeBSD 14.0-RELEASE-p6