Ceil function is used to round up a number i.e. it returns the smallest number which is greater than argument passed to it.
Declaration: double ceil(double);
C program
#include <stdio.h>
#include <math.h>
#include <math.h>
int main()
{
double n, result;
printf("Enter a number to round it up\n");
scanf("%lf", &n);
result = ceil(n);
printf("Original number = %.2lf\n", n);
printf("Number rounded up = %.2lf\n", result);
return 0;
}
Output of program: