Previous answer issue

[lusaib]

Gives last user input when a number in textFeild is one number less than the required size && this happens when back button in
the phone is pressed instead of the tick button on the keyboard.
That is even if the TextFeild has only 9 letters we get an output of 10 that is the previous valid one which is kind of an Error for validation
(NB: New to flutter, so I can't say am right, correct me if am wrong )