ceil()

The ceil function returns the smallest integer that is greater than or equal to x (ie: rounds up the nearest integer).

Sample Program:

/*

Write a program to ceil a number using math function of C.
*/

#include<stdio.h> 

#include<math.h> 

main() 
{ 

 double number, result; 

 printf("Enter a number to round it up\n"); 

 scanf("%lf",&number); 

 result = ceil(number); 

 printf("Original number = %lf\n", number); 

 printf("Number rounded up = %lf\n", result); 

 return 0; 

}