Delphi passing parameters by reference or by value/copy

Question

Context 1

var text:String;

text:=\'hello\';

myFunc(text);

Context2

function myFunc(mytext:String);
var textcopy:String;
b         


        

Answer 1

In Delphi to pass by reference you explicitly add the var keyword:

procedure myFunc(var mytext:String);

This means that myFunc can modify the contents of the string and have the caller see the changes.