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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));

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));

Power

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

printf("%f", pow(4, 3));

Other Math Functions

A list of other popular math functions (from the <math.h> library) can be found in the table below:
C Math Functions | C Programming for Beginners - Class 6

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