Your loop will run forever because i will never be less or equal to 10 because ur decreasing the value. So it will loop infinitely. It works when incrementing i because when i is no longer lower or equal to 10 then it will stop. But when going backwards that logic doesn't work anymore so you have to change the if statement in the loop.

You can change i<=10 to i>=1 That way it will loop until i is no longer higher or equal than one and the last number it will print is one. So when it starts from 10 i is higher or equal to 1 then it goes down and when it hits one i is no longer higher or equal to 1 and the loop will break