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   fabs

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

   Description
   Returns the absolute value of the floating point argument x.

   Example
   #include <stdio.h>
   #include <math.h>
   main()
   {
   double numbr, absval;
        numbr = -1.0;
        absval = fabs(numbr);
        printf("The fabs of (%f) is %f\n",numbr,absval);
   }

   Return Value
   Returns the absolute value of its double argument.