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   floor

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

   Description
   floor returns the largest integer (as a double- precision number)  not
   greater than x.

   Example
   #include <stdio.h>
   #include <math.h>
   main()
   {
   double d;
        d = floor(4.8);
        printf("The floor of 4.8 is %f\n",d);
        d = floor(-4.2);
        printf("The floor of -4.8 is %f\n",d);
   }

   Return Value
   floor returns the double result.