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   ceil

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

   Description
   ceil returns a double value representing the smallest integer that  is
   greater than or equal to x.

   Example
   #include <math.h>
   #include <stdio.h>
   main()
   {
   double x = 5.3,result;
        result = ceil(x);
        printf("The ceil of %f is %f\n",x,result);
   }

   Return Value
   Returns the double value of the smallest integer not less than x.