Why it works wrongly??

Question

https://code.sololearn.com/W5s8x52gOPru/?ref=app

Answer 1

https://code.sololearn.com/W3x6VFv9YjaQ/?ref=app

Answer 2

Just replace valie with value

Answer 3

Try this code...

Answer 4

Thanks about that and what about the error when some one write more than 4 digit

Answer 5

I wrote pattern about that but it doesn't work