Javascript - Function Not Changing Global Variable

Question

My Code (Javascript):

var num = 0;
function change(){
    var num = 10;
}
        change();
        document.write(num);

The result should be 10 but it is showing 0. Why?
If the code is wrong, what is the correct way to do this?

You're declaring a new variable num in the scope of change. Remove the var keyword — Axnyff, Apr 14 '18 at 11:14

score 0 · Accepted Answer · answered Apr 14 '18 at 11:16

0

You are setting another local variable called num.

Just change the inner var num to num.

answered Apr 14 '18 at 11:16

Qontrol

1 Answers1