js return vs break in for loop

1void f()
2{
3   int x = -1;
4   while(true)
5   {
6     if(x == 0)
7        break;         // escape while() and jump to execute code after the the loop 
8     else if(x == 1)
9        return;        // will end the function f() immediately,
10                       // no further code inside this method will be executed.
11
12     do stuff and eventually set variable x to either 0 or 1
13     ...
14   }
15
16   code that will be executed on break (but not with return).
17   ....
18}
19