C Standard Library

C <math.h> - fabs() Function



The C <math.h> fabs() function returns the absolute value (positive value) of the specified number. For example - absolute value of x will be |x|.

Syntax

double fabs (double x);
float fabsf (float x);
long double fabsl (long double x);

Parameters

x Specify a number whose absolute value need to be determined.

Return Value

Returns the absolute value (positive value) of the argument.

Example:

In the example below, fabs() function returns the absolute value (positive value) of the specified number.

#include <stdio.h>
#include <math.h>
 
int main (){
  printf("%lf\n", fabs(10));
  printf("%lf\n", fabs(-10));
  printf("%lf\n", fabs(-5.45));
  printf("%lf\n", fabs(-5.55));  
  return 0;
}

The output of the above code will be:

10.000000
10.000000
5.450000
5.550000

❮ C <math.h> Library

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