| Description |
The Exp function takes an integer or floating point Number and raises e (2.72) to that power.
This is only used for mathematical processing.
Exp has the opposite effect to Ln - the natural logarithm.
|
|
| Related commands |
| Ln |
|
Gives the natural logarithm of a number |
| Log10 |
|
Gives the log to base 10 of a number |
|
|
|
| Example code : Calculate the exponent of 2 |
// 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);
var
float : Double;
begin
// Get the natural logarithm of 2
float := Ln(2);
// Show this value
ShowMessage('Ln(2) = '+FloatToStr(float));
// Get the exponent of this value - reverses the Ln operation
float := Exp(float);
// Show this value
ShowMessage('Exp(Ln(2)) = '+FloatToStr(float));
end;
end.
|
| Hide full unit code |
Ln(2) = 0.693147180559945
Exp(Ln(2)) = 2
|
|