fabs in c

What is fabs in c programming?

fabs function is used to find absolute value of a given number where given number is floating point value.

This function is defined in math.h header file.

Prototype

double fabs(double x);

Parameter

fabs function takes floating point value as input parameter.

Return value

This function returns absolute value of a given number.

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Example program for fabs in c

#include<stdio.h>
#include<stdlib.h>
int main()
{
 double x;
 x=fabs(-100);
 printf("The absolute value of given integer is %lf \n",x);
 return 0;
} 

While using gcc use below command to add math header.

gcc file_name.c -lm

Code explanation

The floating-point absolute value of a given number is found by passing it to the fabs function. The result is being printed onto the console.

fabs() Man page

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Difference between fabs and abs in c

fabs is used to find out the absolute value of the double type of data. abs in c is used to find out the absolute value of a given number.

Prototypes are as follows

double fabs(double y);

int abs(int m);

fabs( )	abs( )
Used to find out absolute value of double type of data.	Used to find out absolute value of integer type of data.
double fabs(double y);	int abs(int m);

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