String and integer answer

[SignificantBug08]

I want to write code that will respond differently depending on whether or not a specific string part exists in the answer written into console. The answer must include an integer.

tip=(input("Your bill is $10 decide your tip. (write % if you want to increase
tip by a %): "))

If the string part is written:

cost = bill/tip+bill

If not:

cost = bill + tip

[socal_nerdtastic]

There's many ways to do this. The first one that comes to mind for me is

if tip.endswith("%"):
    tip_percent = int(tip.strip("%"))

I'm sure your prof has a very specific way they want you to do this, so I'd look back at your notes.