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Albert LeeCourses Plus Student 1,896 Points
Why do we add " + " here? var questionsLeft = "[" + questions +" questions left]" works.
I think we use "+" concate nothing, I don't understand why we should use "+" before the question and after the question.
Steven Parker229,018 Points
The "+" is the concatenation operator, it combines strings together. The code starts with a string containing a bracket, uses the "+" to add on the number of questions, then uses another "+" to add on the rest of the message including a closing bracket.
Note that when you use this symbol with two numbers it is an addition operator instead.