I'm nearly finishing this project but still get an error saying my code doesn't accept invalid inputs, for example...if I input a string instead of an integer throws an error instead of accepting and show a message.

This is the error i get...

Any help would be really appreciated!

:( coke rejects invalid amount of cents
    Did not find "50" in "Amount Due: 20..."

the code:

def main():
    total = 0
    while True:
        total  = int(input("Insert one coin at a time: ").strip())
        coke = 50
        print(total)
        if total > coke:
            print("Change Owed =", total - coke)
            return
        elif total == coke:
            print("No Change Owed, Here's a coke ")
            return
        else:
            print("Amount Due =", coke-total)


main()

CodePudding user response：

You have to remove any excess ' and " from your string input. This can be done with the .replace method:

def main():
    total = 0
    while True:
        total  = int(input("Insert one coin at a time: ").replace('"', '').replace("'", '').strip())
        coke = 50
        print(total)
        if total > coke:
            print("Change Owed =", total - coke)
            return
        elif total == coke:
            print("No Change Owed, Here's a coke ")
            return
        else:
            print("Amount Due =", coke-total)


main()

CodePudding user response：

If you mean to show a message if the input can't be converted to an integer, then you can simply do:

def main():
total = 0
while True:
    try:
        total  = int(input("Insert one coin at a time: ").strip())
    except Exception as e:
        print("Your input is invalid, try again")
        # Optionally you can continue or exit here
        continue
        # exit()
    coke = 50
    print(total)
    if total > coke:
        print("Change Owed =", total - coke)
        return
    elif total == coke:
        print("No Change Owed, Here's a coke ")
        return
    else:
        print("Amount Due =", coke-total)
main()