While loop for float validation

Asked Mar 06 '20 at 12:21

Active Mar 06 '20 at 12:21

Viewed 33 times

I’m making a simple payment system and I want to validate the purchase amount the user inputs. So far all I’ve managed to do is prevent the user inputting 0 or 0.00:

‘’’

amount = float(input(“amount of payment: “))
While amount <= 0:
  Print(“invalid input”)
  amount = float(input(“amount of payment: “))
else:
Runs the rest of the system

What would be the best way to prevent the user inputting any letters or characters such as - or £ and pretty much only allow whole number or decimal places numbers. I have briefly tried to use regex but I can’t get it to work

asked Mar 06 '20 at 12:21

Bystrov_2108

3

You can take advantage of `try-except` – Ch3steR Mar 06 '20 at 12:23
1

What numbers are allowed? All positive, with how many decimal places? – Superluminal Mar 06 '20 at 12:24
All positive with any amount of decimal places, I have code further down to turn the number into 2 d.p – Bystrov_2108 Mar 06 '20 at 12:42

While loop for float validation

0 Answers0