fmod, fmodl

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Header File

math.h

Category

Math Routines

Prototype

double fmod(double x, double y);

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

Description

Calculates x modulo y, the remainder of x/y.

fmod calculates x modulo y (the remainder f, where x = ay + f for some integer a, and 0 < f < y).

fmodl is the long double version; it takes long double arguments and returns a long double result.

Return Value

fmod and fmodl return the remainder f where x = ay + f (as described above). When y = 0, fmod and fmodl return 0.

Example

#include <stdio.h>
#include <math.h>
int main(void)
{
   double x = 5.0, y = 2.0;
   double result;
   result = fmod(x,y);
   printf("The remainder of (%lf / %lf) is %lf\n", x, y, result);
   return 0;
}

Portability

	POSIX	Win32	ANSI C	ANSI C++
fmod	+	+	+	+
fmodl		+	+	+