C library function - fabs()

Description

The C library function double fabs(double x) returns the absolute value of x.

Declaration

Following is the declaration for fabs() function.

double fabs(double x)

Parameters

• x -- This is the floating point value.

Return Value

This function returns the absolute value of x.

Example

The following example shows the usage of fabs() function.

#include <stdio.h>
#include <math.h>

int main ()
{
   int a, b;
   a = 1234;
   b = -344;
  
   printf("The absolute value of %d is %lf\n", a, fabs(a));
   printf("The absolute value of %d is %lf\n", b, fabs(b));
   
   return(0);
}

Let us compile and run the above program, this will produce the following result:

The absolute value of 1234 is 1234.000000
The absolute value of -344 is 344.000000