javascript question to a challenge

Question

var i = 12;
(++i) % 3;
alert(i);

my solution was: 1
the right solution was : 13;

but why? can someone plz explain to me why 13?

Answer 1

Because you've increment i of one so i is 13

If the question was :
var i = 12
i = (++i) % 3
alert(i)
The solution is 1

Answer 2

this look like a little trick question, (++i) % 3; actually do nothing except increment the variable i. So you thought that the result was 13 % 3 = 1, but this result isn't being stored anywhere. The alert only print the new i wich is now 13.

Answer 3

thank you! 😊 my mistake. 🤭