StrToIntDef

function StrToIntDef(const IntegerString string; Default Integer):Integer;

The StrToIntDef function converts an Integer string, IntegerString such as '100' into an Integer value, with a Default if the conversion fails.

It supports +ve and -ve numbers, and hexadecimal numbers, as prefixed by $ or 0x.

Example:

Base Syntax

 var
   firstNumber,secondNumber, thirdNumber, fourthNumber : Integer;
 
 begin
 
   firstNumber := 32;
   secondNumber := StrToIntDef('test00', 10);  // Leading blanks are ignored
   thirdNumber := StrToIntDef('$1E', 0);    // Hexadecimal values start with a '$'
   fourthNumber := StrToIntDef('-0x1E', 0);  // ... or with a '0x'
 
   ShowMessage('firstNumber : '+IntToStr(firstNumber));
   ShowMessage('secondNumber : '+IntToStr(secondNumber));
   ShowMessage('thirdNumber : '+IntToStr(thirdNumber));
   ShowMessage('fourthNumber : '+IntToStr(fourthNumber));
 
 end;

TRObject Syntax

 var
   firstNumber,secondNumber, thirdNumber, fourthNumber : Integer;
 
 {
 
   firstNumber = 32;
   secondNumber = StrToIntDef('test00', 10);  // Leading blanks are ignored
   thirdNumber = StrToIntDef('$1E', 0);    // Hexadecimal values start with a '$'
   fourthNumber = StrToIntDef('-0x1E', 0);  // ... or with a '0x'
 
   ShowMessage('firstNumber : '+IntToStr(firstNumber));
   ShowMessage('secondNumber : '+IntToStr(secondNumber));
   ShowMessage('thirdNumber : '+IntToStr(thirdNumber));
   ShowMessage('fourthNumber : '+IntToStr(fourthNumber));
 
 }

Output:

firstNumber : 32
secondNumber : 10
thirdNumber : 30
fourthNumber : -30