Syntax

#include <math.h>
double fmod(double x, double y);

fmod 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.

fmod returns the floating-point remainder of x/y. If y is zero or if x/y causes an overflow, fmod returns 0.

This example computes z as the remainder of x/y; here, x/y is -3 with a remainder of -1.

#include <math.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);
   return 0;

   /****************************************************************************
      The output should be:

      fmod( -10.000000, 3.000000) = -1.000000
   ****************************************************************************/
}

• ceil
  
• fabs
  
• floor

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