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

Posted by Tom Lawrence
Tom Lawrence
8,685 Points

' [' + questions + ' questions left]'

Hi,

I do not really understand the reason for the first ' or the structure of this statement really, I understand what it does but not now!

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

I would have expected it to be done like this:

var questionsLeft = " " + questions + " Questions Left";

both obviously work but nice to know / understand the first one :)

4 Answers

Florin Veja
Florin Veja
6,912 Points

Tom,

var questions = 5;
var questionsLeft =  ' [' + questions + ' questions left]';

After running, would leave the variable questionsLeft to be "[5 questions left]", without the quotes.

var questions = 5;
var questionsLeft = " " + questions + " Questions Left";

Would leave the variable questionsLeft with the value " 5 Questions Left", without the quotes.

Notice, the second code does not have the square brackets. [ and ]. There is no reason for having the [ and ] in the first code. except to display them.

Hope that helps.

Michael Jurgensen
Michael Jurgensen
8,341 Points
Michael Jurgensen
Michael Jurgensen
8,341 Points

Hi Tom,

These two pieces of code are very similar. The first will print a set of literal square brackets with the number of questions remaining like this:

(Assuming there is 1 question remaining)

" [1 questions left]"

The other section of code will print:

" 1 Questions Left"

I hope that clears up any confusion.

Tom Lawrence
Tom Lawrence
8,685 Points
Tom Lawrence
Tom Lawrence
8,685 Points

Oh I didnt even notice it was printing the [], I was thinking it was some crazy array I have never seen before inside speach marks!

Thanks for that

E P
E P
2,215 Points
E P
E P
2,215 Points

yes I had the same confusion because of the brackets! LOL thanks for clearing this up.