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Start your free trialClay Asbury
1,197 PointsFor the quiz, is it ok to use correct++ for each right answer instead of correct + 1?
Worked ok in my quiz, but wasn't sure which would be preferred in this case.
1 Answer
Eric Butler
33,512 PointsHey Clay, if you tried it and it worked, then I guess it's fine. One thing to point out about the ++ method of incrementing values up, is that where you place the ++ changes what the value is at the moment it's used:
var a = 1;
var b = a + 1;
console.log(b); // b is 2, as you'd expect.
var c = 1;
var d = c++;
console.log(d); // d is actually 1, because c only became 2 AFTER it was assigned to d.
var e = 1;
var f = ++e;
console.log(f); // f is 2, because e became 2 and THEN was assigned to f.
The difference is where the ++ is placed: after the variable means it gets incremented after doing whatever it's doing there (in the case above, being assigned to the new variable). Before the variable means it gets incremented before doing whatever it's doing there.
Clay Asbury
1,197 PointsClay Asbury
1,197 PointsYes, it worked, but I can see how placement could lead to unforeseen results. Thank you for this very helpful answer!
polentz
Full Stack JavaScript Techdegree Student 11,755 Pointspolentz
Full Stack JavaScript Techdegree Student 11,755 PointsEric great and useful explanation, thanks!