REMAINDER(3) Linux Programmer's Manual REMAINDER(3)NAME
drem, dremf, dreml, remainder, remainderf, remainderl - floating-point
remainder function
SYNOPSIS
#include <math.h>
/* The C99 versions */
double remainder(double x, double y);
float remainderf(float x, float y);
long double remainderl(long double x, long double y);
/* Obsolete synonyms */
double drem(double x, double y);
float dremf(float x, float y);
long double dreml(long double x, long double y);
Link with -lm.
DESCRIPTION
The remainder() function computes the remainder of dividing x by y.
The return value is x - n * y, where n is the value x / y, rounded to
the nearest integer. If this quotient is 1/2 (mod 1), it is rounded to
the nearest even number (independent of the current rounding mode). If
the return value is 0, it has the sign of x.
The drem() function does precisely the same thing.
RETURN VALUE
The remainder() function returns the remainder, unless y is zero, when
the function fails and errno is set.
ERRORS
EDOM The denominator y is zero.
CONFORMING TO
IEC 60559. The functions remainder(), remainderf(), and remainderl()
are from C99. The function drem() is from 4.3BSD. The float and long
double variants dremf() and dreml() exist on some systems, such as
Tru64 and glibc2.
EXAMPLE
The call "remainder(29.0, 3.0)" returns -1.
SEE ALSOfmod(3), remquo(3)
2003-11-18 REMAINDER(3)