C Math ceil() Function
Example
Round numbers up to the nearest integer:
printf("%f", ceil(0.60));
printf("%f", ceil(0.40));
printf("%f", ceil(5));
printf("%f", ceil(5.1));
printf("%f", ceil(-5.1));
printf("%f", ceil(-5.9));
Definition and Usage
The ceil() function rounds a number UP to the nearest integer.
The ceil() function is defined in the <math.h> header file.
Tip: To round a number DOWN to the nearest integer, look at the floor() function.
Tip: To round a number to the nearest integer in either direction, look at the round() function.
Syntax
One of the following:
ceil(double number);Parameter Values
| Parameter | Description |
|---|---|
| number | Required. Specifies a number. |
Technical Details
| Returns: | A double value representing the nearest integer greater or equal to a number. |
|---|