C Math Functions | Mathematical Function in C (with examples)

In many situations the mathematical functions such as sqrt(), pow(), round(), log() etc. are needed. Almost every C compiler supports these basic mathematical functions.

All these functions are defined in <math.h> header file. The math.h header defines various mathematical functions including trigonometric and hyperbolic functions so, we must include this file in the beginning of the program as #include<math.h> 

The commonly used functions of math.h header file are given below: 

	Function	Description
1.	ceil(number)	Rounds up the given number. It returns the integer value which is greater than or equal to given number.
2.	floor(number)	Rounds down the given number. It returns the integer value which is less than or equal to given number.
3.	sqrt(number)	Returns the square root of given number.
4.	pow(base,         exponent)	Returns the power of given number.
5.	fabs(number)	Returns the absolute value of a number.
6.	round()	Returns the nearest integer value of the given number
7.	log()	Computes the natural logarithm of an argument.
8.	log10()	Returns the logarithm to the base of 10.
9.	exp()	Returns the result of e raised to the power of x.
10.	frexp()	Splits a floating-point value into a fraction and an exponent.
11.	fmod()	Returns the remainder
12.	sin()	Returns the sine of a number.
13.	sinh()	Returns the hyperbolic sine of a number
14.	cos()	Returns the cosine of a number
15.	cosh()	Returns the hyperbolic cosine of a number
16.	tan()	Returns tangent of the argument passed.
17.	tanh()	Computes the hyperbolic tangent of an argument.
18.	asin()	Returns the arc sine of a number
19.	acos()	Returns the arc cosine of a number
20.	atan(d)	Returns the arc tangent of a number

 

Example:  

A simple example of math functions found in "math.h" header file:

 

#include<stdio.h>  

#include <math.h>    

int main()

{    

printf("\n%.2f",ceil(3.3));    

printf("\n%.2f",floor(3.2));    

printf("\n%.2f",sqrt(16));    

printf("\n%.2f",sqrt(7));    

printf("\n%.2f",pow(2,4));    

printf("\n%.2f",pow(3,3));    

printf("\n%d",abs(-12));     

return 0;    

}    

Output: