While loop

Question

Why does the answer evaluate to 15? Shouldn't the answer be 5?

var sumOfNumbers = 0;
var number of loops =5;
var counter =1;
while (counter <= numberOfLoops) {
sumOfNumbers += counter;
counter++;
}
alert (sumOfNumbers);

Answer 1

It’s not 5 because you increase the counter by one each time so sumOfNumbers is 1+2+3+4+5 which is 15

Answer 2

In every loop counter is added to sumOfNunbers and being incremented results as sumOfNumbers = 1+2+3+4+5 = 15