function, number++

Question

Why is this returning 5?
The following code will result in what value?
function test(number)
{
while(number < 5) {
number++;
}
return number;
}
alert(test(2));

Thank you!

Answer 1

number=2;
while(number<5){
number++;
}
Loop iteration :
2<5//true number++
3<5//true number++
4<5//true number++
5<5//false exit the loop
Now number=5