IsDigit

Declaration

Function IsDigit( const S : string) : Boolean

Example

procedure OnMapEvent(var Value:Variant);
begin
  Value := IsDigit('a'); //returns false
Value := IsDigit('4'); //returns true.
end;

Description

Returns True or False depending on whether the input string is a numeric digit or not. This function only checks the first character in the given string parameter.

Refer IsNumber for a function that checks a string of multiple characters to determine whether they are all digits.