function Frac (x: Real): Real;
Frac returns the fractional part of a floating point number.
Frac is a Borland Pascal extension.
     program FracDemo;
     
     begin
       WriteLn (Frac (12.345) : 1 : 5);  { 0.34500 }
       WriteLn (Int (12.345) : 1 : 5);  { 12.00000 }
       WriteLn (Round (12.345) : 1);  { 12 }
       WriteLn (Trunc (12.345) : 1);  { 12 }
     
       WriteLn (Frac (-12.345) : 1 : 5);  { -0.34500 }
       WriteLn (Int (-12.345) : 1 : 5);  { -12.00000 }
       WriteLn (Round (-12.345) : 1);  { -12 }
       WriteLn (Trunc (-12.345) : 1);  { -12 }
     
       WriteLn (Frac (12.543) : 1 : 5);  { 0.54300 }
       WriteLn (Int (12.543) : 1 : 5);  { 12.00000 }
       WriteLn (Round (12.543) : 1);  { 13 }
       WriteLn (Trunc (12.543) : 1);  { 12 }
     
       WriteLn (Frac (-12.543) : 1 : 5);  { -0.54300 }
       WriteLn (Int (-12.543) : 1 : 5);  { -12.00000 }
       WriteLn (Round (-12.543) : 1);  { -13 }
       WriteLn (Trunc (-12.543) : 1);  { -12 }
     end.
Real Types, Real, Int, Round, Trunc.