Unexpected infinite loop

This code runs for infinity, why?

    function f(n){
        i=0;
        if (n==2){
            while(i<2){
                f(i);
                i++;
            }
        }
    }

if n!=2 the function should do nothing and if n equals 2 the function calls f(0) and f(1) so it should stop after that but you only get infinite loop when you run it.

any one could tell why?

edit: there is nothing outside the function.

and no need for better code.Just asking why.