[Kwarde]

@Rajat_Pawar: It's not needed in the code above. However, some people prefer to make this functions like this:
FUNCTION('string data');
And you can use:
FUNCTION("string data");
Do you see the differences? The ' and the ".
When you use the ' to make this, using that character again would mean that the string is ended, like this:
FUNCTION('string data '1' '2'');
This would mean that the string would stop reading here:
FUNCTION ('string data '
Then you'll get errors. However, when you use \', it will be calculated as a normal ' so that this won't happen. But PaulDiman used it like this: FUNCTION("string data"); so it's not needed (as far as I know)

I hope you understood that because I have no idea how to explain it else.