How to replace last character in nested loops?

Question

I'm trying to get output to display your inputted numbers in words:

phone = input("Phone: ")
digits_mapping = {
    "1": "One",
    "2": "Two",
    "3": "Three",
    "4": "Four",
    "5": "Five",
    "6": "Six",
    "7": "Seven",
    "8": "Eight",
    "9": "Nine"
}
output = ""
for character in phone:
    output += digits_mapping.get(character) + ", "
print(output, end="")

For example, if input is equal to 545, I will get Five, Four, Five,

How do i get Five, Four, Five!

Answer 1

Here's another strategy - check to see if you are on the last item in the list. If you are, append "!" - otherwise, append ", ".

phone = input("Phone: ")
digits_mapping = {
    "1": "One",
    "2": "Two",
    "3": "Three",
    "4": "Four",
    "5": "Five",
    "6": "Six",
    "7": "Seven",
    "8": "Eight",
    "9": "Nine"
}
output = ""
for i in range(len(phone)):
  if i == len(phone) - 1:
    output += digits_mapping.get(phone[i]) + "!"
  else:
    output += digits_mapping.get(phone[i]) + ", "
    
print(output, end="")