Unchecked Room Number Range

[raydenlim]

^ Screenshot of the compilation error in the terminal

add r/4562762855 d/2023-11-03 15:32 to 2023-11-04 11:00 n/hehe haha p/001 e/hehe@h.com rm/Needs a personal butler

While this doesnt break the code, clicking enter does not return any error messages in the display terminal. As such, users might think that the App has frozen/crashed (I thought it was the case initially!)

It would be good to do some check for extreme values, to ensure that the room numbers are in the proper range of between 1 and 500. If not, return an error message, so that a feed back is given to the user.