NAME

fmod, fmodf, fmodl — floating-point remainder functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
fmod(double x, double y);

float
fmodf(float x, float y);

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

DESCRIPTION

The fmod(), fmodf(), and fmodl() functions compute the floating-point remainder of x/ y.

RETURN VALUES

If y is non-zero, the fmod(), fmodf(), and fmodl() functions return the value x-i*y, for some integer i, such that the result has the same sign as x and magnitude less than the magnitude of y. If y is zero, a NaN is produced.

SEE ALSO

math(3)

STANDARDS

The fmod(), fmodf(), and fmodl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).

HISTORY

An fmod() function first appeared in Version 5 AT&T UNIX.