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C Math Functions


Math Functions

There is also a list of math functions available, that allows you to perform mathematical tasks on numbers.

To use them, you must include the math.h header file in your program:

#include <math.h>

Square Root

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

Example

printf("%f", sqrt(16));
Try it Yourself »

Round a Number

The ceil() function rounds a number upwards to its nearest integer, and the floor() method rounds a number downwards to its nearest integer, and returns the result:

Example

printf("%f", ceil(1.4));
printf("%f", floor(1.4));
Try it Yourself »

Power

The pow() function returns the value of x to the power of y (xy):

Example

printf("%f", pow(4, 3));
Try it Yourself »

Complete Math Reference

For a complete reference of math functions, go to our C <math.h> Library Reference.




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