C ceil() function

C ceil() function - Find integer

Syntax:

double ceil(double x)

The ceil() function is used to compute the smallest integer that is greater than or equal to x.

Parameters:

Return value from ceil()

• Returns the integer as a double value.

Example: ceil() function

The following example shows the usage of ceil() function.

#include <math.h>
#include <stdio.h>
 
int main(void)
{
   double x, y, z;
   x = 123.345;        
   y = 1.05;        
   z = -1.05;       
   printf("Before applying ceil():");
   printf("\nx = %.3f ; y = %.2f ; z = %.2f\n", x, y, z);
   x = ceil(123.345);        
   y = ceil(1.05);        
   z = ceil(-1.05);       
   printf("\n\nAfter applying ceil():");
   printf("\nx = %.3f ; y = %.2f ; z = %.2f\n", x, y, z);
}

Output:

Before applying ceil():
x = 123.345 ; y = 1.05 ; z = -1.05


After applying ceil():
x = 124.000 ; y = 2.00 ; z = -1.00

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