Can someone please explain this loop?

Question

var x = [1, 2, 3, 4, 5];
var count = 0;

for (var i = 1; i < 5; i ++) {
if (x[i] >i )
count = count + 1;
}

//it outputs 4 but I'm still yet to figure out why?

Answer 1

Hi Duke,

Going through the for loop and the x array starting with i = 1 we have;

x[1] = 2, x[2] = 3 ... x[4] = 5 etc

Each time x[i] is bigger than i

Then because of that the count variable increments by 1. This happens 4 times.

At i = 1; x[1] = 2, 2 > 1 hence count + 1 = 1, count is now 1
"" count + 1 = 2, count is now 2
"" ""
At i = 4; x[4] = 5, 5 > 4 hence count + 1 = 4

Answer 2

Thanks a lot Jay. loops & iteration has always been a little bit confusing to me. it's clearer now; thanks.

Answer 3

pls can some1 pls explain generics in codes