Why is this output '0'? I think the answer is 1

Question

It's question is :
What is the output of this code?
var x = 100;
while (x>=50){
x--;
}
x%=7;
document.write(x);

And the answer is 0.

Answer 1

The loop doesn't finish until x is not greater equal to 50 (smaller than 50), so x would be 49 after the loop. 49 % 7 = 0