| Description |
The Round function rounds a floating point Number to an Integer value.
The rounding uses Bankers rules, where an exact half value causes a rounding to an even number:
| 12.4 rounds to | 12 |
| 12.5 rounds to | 12 // Round down to even |
| 12.6 rounds to | 13 |
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| 13.4 rounds to | 13 |
| 13.5 rounds to | 14 // Round up to even |
| 13.6 rounds to | 14 |
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| Notes |
The Trunc function does the same, but returns the integer in an Integer value.
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| Related commands |
| Frac |
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The fractional part of a floating point number |
| Int |
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The integer part of a floating point number as a float |
| Trunc |
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The integer part of a floating point number |
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| Example code : A simple example |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
// The System unit does not need to be defined
SysUtils,
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
begin
ShowMessage('Round(12.75) = '+IntToStr(Round(12.75)));
ShowMessage('Trunc(12.75) = '+IntToStr(Trunc(12.75)));
ShowMessage(' Int(12.75) = '+FloatToStr(Int(12.75)));
ShowMessage(' Frac(12.75) = '+FloatToStr(Frac(12.75)));
end;
end.
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| Hide full unit code |
Round(12.75) = 13
Trunc(12.75) = 12
Int(12.75) = 12
Frac(12.75) = 0.75
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