How to reverse the order in a FOR loop

Question

I\'ve a simple FOR statement like this:

var num = 10,
    reverse = false;

for(i=0;i

when rever

Answer 1

var start; var end; var inc;
if (reverse) {
    start = num-1; end = 0; inc = -1;
}
else {
    start = 0; end = num-1; inc = 1;
}
for(i=start;i!=end;i+=inc){
    console.log(i)
}