Determines the positive difference between its arguments.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <math.h>

      double fdim  (double x, double y);

      float fdimf  (float x, float y);

      long double fdiml  (long double x, long double y);

  Additional Information (explode) :

• Argument
• Description
• Return Values