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JavaScript JavaScript Basics (Retired) Working With Numbers The Mad Libs Challenge Revisited

Johnny Tran
Johnny Tran
5,333 Points
Posted by Johnny Tran
Johnny Tran
5,333 Points

+ signs on both sides of question var. What is it for?

questionsLeft = ' [' + questions + ' questions left]';

Hi, can someone please explain what the two + signs on either side of question var is. I deleted them from my code and the page stopped working but I dont understand why.

Thanks

3 Answers

David Tonge
David Tonge
Courses Plus Student 45,640 Points

The '+' signs are used for concatenation. It joins your strings together with the variables to create one string. let's say questions = 5, in this case, then it would read: '[ 5 questions left ]'

Johnny Tran
Johnny Tran
5,333 Points
Johnny Tran
Johnny Tran
5,333 Points

Thank you. But why one + at the front of questions +questions+?

The original code is: questionsLeft = ' [' +questions+ ' questions left]';

Is this code the same as

questions left += ' [' questions+ ' questions left]';

Thanks a bunch!

David Tonge
David Tonge
Courses Plus Student 45,640 Points

because there's strings on both sides of the variable: '[' and 'questions left]'

Jesse Hall
Jesse Hall
4,275 Points
Jesse Hall
Jesse Hall
4,275 Points

The first + is there because we wanted to include a [ in our message (along with a space after it) then comes your + to include the variable question.