| Description |
The Sqr function returns the square of a Number.
Sqr(Number) = Number * Number
The number may be an integer or floating point type.
Integer, Int64 numbers
If the square of the number exceeds the capacity of the target variable, then the result is :
Result Mod Capacity
Extended numbers
If the square of the number exceeds the capacity, EOverFlow exception is raised.
Special values are treated as follows:
| Infinity, -Infinity | : Infinity |
| NaN (Not a Number) | : NaN |
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| Related commands |
| Dec |
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Decrement an ordinal variable |
| Inc |
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Increment an ordinal variable |
| Sqrt |
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Gives the square root of a number |
| Sum |
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Return the sum of an array of floating point values |
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| Example code : Find the square of various values |
// 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
Math,
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);
var
number, squared : Byte;
float : Extended;
begin
// The square of 15 = 225
number := 15;
squared := Sqr(number);
ShowMessageFmt('%d squared = %d',[number, squared]);
// The square of 17 = 289
// But result exceeds byte size, so result = 289 MOD 256 = 33
number := 17;
squared := Sqr(number);
ShowMessageFmt('%d squared = %d (see code above)',[number, squared]);
// The square of infinity is still infinity
float := Infinity;
float := Sqr(float);
ShowMessageFmt('Infinity squared = %f',[float]);
end;
end.
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| Hide full unit code |
15 squared = 225
17 squared = 33 (see code above)
Infinity squared = INF
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