How i can do two or more line's on tips

Question

How I can do two or more line's on tips?

I do :

var firstLine = "1st Line";
var secondLine = "2nd Line";
var thirdLine = "3rd Line"
var myTips = firstLine +' '+ secondLine +' '+ thidrLine

And I get "1st Line 2nd Line 3rd Line"

On tips I want get

"1st Line
2nd Line
3rd Line"

How I can want it? I try '\n' and '\r\n' and i didn't get the desired result

Answer 1

var myTips = firstLine +'<br>'+ secondLine +'<br>'+ thidrLine;