Back to: C

There are a number of math functions that are available, allowing you to perform mathematical operations on numbers. To use these functions, you need to include the math.h header file:

`#include <math.h>`

## square root

To find the square root of a number, use the sqrt() function:

`printf("%f", sqrt(10));`

## rounding up

To round a number up to the nearest integer, use the ceil() function:

`printf("%f", ceil(1.3));`

## rounding down

To round a number down to the nearest integer, use the floor() function:

`printf("%f", floor(1.3));`

## power

To find the power of a number, use the pow() function:

`printf("%f", dow(3, 9));`