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Trunc

Synopsis


function Trunc (x: Real): Integer;

Description

Trunc returns the integer part of a floating point number as an integer. Use Int to get the integer part as a floating point number.

Conforming to

Trunc is defined in ISO 7185 Pascal and supported by all known Pascal variants.

Example


program TruncDemo;

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.

See also

Real Types, Real, Int, Frac, Round.