Syntax

#include <math.h>
double fabs(double x);

fabs calculates the absolute value of the floating-point argument x.

fabs returns the absolute value. There is no error return value.

This example calculates y as the absolute value of x:

#include <math.h>

int main(void)
{
   double x,y;

   x = -5.6798;
   y = fabs(x);
   printf("fabs( %lf ) = %lf\n", x, y);
   return 0;

   /****************************************************************************
      The output should be similar to :

      fabs( -5.679800 ) = 5.679800
   ****************************************************************************/
}

• abs
  
• labs

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