fmod() — Calculate Floating-Point Remainder
Format
#include <math.h>
double fmod(double x, double y);
Language Level
ANSI
Threadsafe
Yes
Description
The fmod()
function
calculates the floating-point remainder of x/y.
The absolute value of the result is always less than the absolute
value of y. The result will have the same
sign as x.
Return Value
The fmod()
function
returns the floating-point remainder of x/y.
If y is zero or if x/y causes
an overflow, fmod()
returns 0.
The value of errno can be set to EDOM.
Example
This example computes z as
the remainder of x/y;
here, x/y is
-3 with a remainder of -1.
#include <math.h>
#include <stdio.h>
int main(void)
{
double x, y, z;
x = -10.0;
y = 3.0;
z = fmod(x,y); /* z = -1.0 */
printf("fmod( %lf, %lf) = %lf\n", x, y, z);
}
/******************* Output should be similar to: ***************
fmod( -10.000000, 3.000000) = -1.000000
*/