Contents | Index | < Browse | Browse >

---

LETTERceilULETTER Rounds floating-point numbers.

Overview
#include <math.h>

d = ceil(x);

double d; // result
double x; // floating-point number

Portability
ANSI

Description
In contrast to "floor", "ceil" rounds the specified double-precision floating-point number to the next whole number.

Returns
This function returns the smallest whole number not less than the specified double-precision argument.

See also
floor

Example
#include <stdio.h>
#include <math.h>

double r;

void main(void)
{
r = ceil(473.76); // r contains the number 474.0
printf("ceil(473.76) = %lf\\n", r);
}