SysUtils.StrToInt Function

Converts a string that represents an integer (decimal or hex notation) to a number.

Pascal

function StrToInt(const S: string): Integer; overload;

C++

int StrToInt(const AnsiString S);

File

SysUtils

Description

StrToInt converts the string S, which represents an integer-type number in either decimal or hexadecimal notation, into a number. If S does not represent a valid number, StrToInt raises an EConvertError exception.

C++ Examples:

Copy Code

/*
This example uses two edit boxes and a button on a form. When the user clicks
the button, the code converts the values in the edit boxes to numbers, adds them,
and displays a message indicating the sum:
*/
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  int i1, i2;
  i1 = StrToInt(Edit1->Text);
  i2 = StrToInt(Edit2->Text);
  ShowMessage(IntToStr(i1 + i2));
}

Delphi Examples:

Copy Code

{
This example uses two edit boxes and a button on a form. When the user clicks
the button, the code converts the values in the edit boxes to numbers, adds them,
and displays a message indicating the sum:
}
procedure TForm1.Button1Click(Sender: TObject);
var
  I: Integer;
  J: Integer;
begin
  I := StrToInt(Edit1.Text);
  J := StrToInt(Edit2.Text);
  ShowMessage(IntToStr(I + J));
end;