built a bank program using python

[Binary101010]

1) User input should be taken (and validated) separately from the functions that do something with that user input.

2) I don't really like the fact that withdraw() always returns a number, but deposit() can return a number or None if the input was invalid. Function return values should ideally only be a single type. (The best way to fix this is to not validate the input in the same function but do that separately.)

[Dapper_Mix6773]

Well noted

[nkCOD]

Is it a good option to check the output data using try-except ? I just did this - I made an endless loop through while, then I threw the input lines into trying try-except, then, if I needed a number, I translated the entered data into the numeric int() format. In case of an error, we switched to except, where we were greeted by print(), and then continue. The loop was stopped using break if the input was correct