Syntax

#include <math.h>
double floor(double x);

floor calculates the largest integer that is less than or equal to x.

floor returns the floating-point result as a double value.

The result of floor cannot have a range error.

This example assigns y value of the largest integer less than or equal to 2.8 and z the value of the largest integer less than or equal to -2.8.

#include <math.h>

int main(void)
{
   double y,z;

   y = floor(2.8);
   z = floor(-2.8);
   printf("floor(  2.8 ) = %lf\n", y);
   printf("floor( -2.8 ) = %lf\n", z);
   return 0;

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

      floor(  2.8 ) = 2.000000
      floor( -2.8 ) = -3.000000
   ****************************************************************************/
}

• ceil
  
• fmod

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