Loop 5 Killed

Due to an error in the code of the loops they will run infinitely. Since infinite loops consume a large amount of resources and are rarely intentional, Treehouse automatically kill loops that appear to be running infinitely.

The reason the loops end up running infinitely is due to this line:

i = Math.floor(Math.random * 10);

Which is present in both of the loops. You have forgotten to place parenthesis () after your call to the Math.random method. The parenthesis is what tells JavaScript to actually call the method, without those it will instead place a reference to the method itself there. Since a method definition cannot be multiplied the result of Math.random * 10 is NaN (Not a Number).

Since NaN is not equal to 8 (and i is always set to NaN) the while condition of the loop i !== 8 will always remain true. If you fix the code like this:

// Do while loop
do {
  i = Math.floor(Math.random() * 10);
  text += i + ' ';
} while ( i !== 8 ) 

// While loop
i = Math.floor(Math.random() * 10);
while ( i !== 8 ) {
  text += i + ' ';
  i = Math.floor(Math.random() * 10);
}

Then your loops will work.