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FDIM(3) Library Functions Manual FDIM(3)

fdim, fdimf, fdimlpositive difference functions

library “libm”

#include <math.h>

double
fdim(double x, double y);

float
fdimf(float x, float y);

long double
fdiml(long double x, long double y);

The (), (), and () 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 iff the exact result is not representable in the return type. No other exceptions are raised.

fabs(3), fmax(3), fmin(3), math(3)

The fdim(), fdimf(), and fdiml() functions conform to ISO/IEC 9899:1999 (“ISO C99”).

These routines first appeared in FreeBSD 5.3 and NetBSD 5.1.

June 29, 2004 NetBSD-9.2