Delphi: Trim, TrimLeft and TrimRight - Cut off whitespace from a string

Cutting off white space such as blanks, tabs and line breaks from the front and the rear of a string is an easy task in Delphi and Lazarus. Delphi and Lazarus are providing the functions Trim, TrimLeft and TrimRight for this. Let's have a look at an example:

var
   str, str1, str2, str3: string;
begin
   str := '   ABC   ';

   str1 := Trim(str);       // "ABC"
   str2 := TrimLeft(str);   // "ABC   "
   str3 := TrimRight(str);  // "   ABC"
end;

We are processing the string "   ABC   " by using Trim, TrimLeft and TrimRight. Trim is cutting the spaces at the front and the rear of the string. TrimLeft and TrimRight are cutting the white space only at the left or the right side.