why?

Question

hi i have trouble of memory number++ means number+1 or 2 right?

why here;

function test(number)
{
while(number < 5) {
number++;
}
return number;
}
alert(test(2));

the result is not 3 or 4 ?

Answer 1

number++ means number+1
Answer should be 5

Answer 2

number++ is equivalent to number=number+1.
You are using a while loop in the loop you declared number++.
When number==5 the while loop stops.
That's why the result is 5.