Question

Ok so lets say I have boolean x = false. If I have a loop that says while (!x) does this mean while x is NOT false (true) or while x is NOT true (false)?

EDIT:
Ok I’m a bit confused, I think Im getting different answers. So if I have

 int x=0;
 boolean add1=false;
 while (!add1){
        x=1;
}

What is the final value of x in this case?

Answer 1

x=false;
while (!x)

substituting the value of x we have

while(!false)

Now ! is the logical complement operator which inverts the value of a boolean so we get

while(true)  

So we keep looping till x is false or till !x is true.

Note that the value of the variable can change in the body of the loop causing the looping to break. Consider a typical search program which uses a boolean variable called found:

found = false;  // initialize found to false.
while(!found) { // keep looping till key is not found.
  ...
  if(key is found) {
    found = true; // key found...make found true. 
  }
}

UPDATE:

In your updated question add1 is false initially so !add1 is true so we enter the while loop and change x to 1. Since the value of add1 does not change in the loop and there are no break and return you keep looping infinitely.