Trunc

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The RTL System unit contains function trunc which truncates a real-type value to an Integer-type value. It's input parameter is a real-type expression.Trunc returns a Longint value that is the value of the input parameter rounded toward zero.

Declaration

function Trunc(X: Real): Longint;

Example Usage

begin
   WriteLn( Trunc(8.7) );
   WriteLn( Trunc(8.3) );
   WriteLn( Trunc(-8.7) );
   WriteLn( Trunc(-8.3) );

end;

Output

8
8
-8
-8

See also

• round
• math.ceil - round up
• math.floor - round down
• frac - returns the fractional part of a floating point value
• int - returns the integer part of a floating point value
• div - integer division
• Comparison of approaches for rounding to an integer