Add a line break to a string type expression

[Durval]

Is there a way to add a line break/carriage return to a string expression?

I'd like to create a property that lists different parts of doors/windows in schedules, something like this:

1 fixed glass leaf
3 sliding glass leaves
2 sliding screen leaves

To do so, I created an expression combining 'IF' (the quantity of a certain type of leaf is greater than zero) and 'CONCAT'.
In MS Excel, I could use 'CHAR(10)' inside the CONCAT for the line break, but 'CHAR()' function is not available in expression editor.