In season 7, episode 24 of Seinfeld, Kramer visits a bank that promises to give $100 to anyone who isn’t greeted with a “hello.” Kramer is instead greeted with a “hey,” which he insists isn’t a “hello,” and so he asks for $100. The bank’s manager proposes a compromise: “You got a greeting that starts with an ‘h,’ how does $20 sound?” Kramer accepts.
In a file called bank.py
, implement a program that prompts the user
for a greeting. If the greeting starts with “hello”, output $0
. If the
greeting starts with an “h” (but not “hello”), output $20
. Otherwise,
output $100
. Ignore any leading whitespace in the user’s greeting, and
treat the user’s greeting case-insensitively.
Hints
- Recall that a
str
comes with quite a few methods, per docs.python.org/3/library/stdtypes.html#string-methods. - Be sure to give $0 not only for “hello” but also “hello there”, “hello, Newman”, and the like.
- Log into cs50.dev using your GitHub account.
- Click inside the terminal window and execute
cd
. - Execute
wget https://cdn.cs50.net/2022/fall/labs/6/bank.zip
followed by Enter in order to download a zip calledbank.zip
in your codespace. Take care not to overlook the space betweenwget
and the following URL, or any other character for that matter! - Now execute
unzip bank.zip
to create a folder calledbank
. - You no longer need the ZIP file, so you can execute
rm bank.zip
and respond with “y” followed by Enter at the prompt.
Here’s how to test your code manually:
- Run your program with
python bank.py
. TypeHello
and press Enter. Your program should output:$0
- Run your program with
python bank.py
. TypeHello, Newman
and press Enter. Your program should output:$0
- Run your program with
python bank.py
. TypeHow you doing?
and press Enter. Your program should output$20
- Run your program with
python bank.py
. TypeWhat's happening?
and press Enter. Your program should output$100
You can execute the below to check your code using check50
, a program
that CS50 will use to test your code when you submit. But be sure to
test it yourself as well!
check50 cs50/problems/2022/python/bank
Green smilies mean your program has passed a test! Red frownies will
indicate your program output something unexpected. Visit the URL that
check50
outputs to see the input check50
handed to your program,
what output it expected, and what output your program actually gave.
No need to submit! This is a practice problem.