Put it all together — build real programs, live in your browser.
Write functions to convert between Celsius and Fahrenheit.
The classic interview warm-up: numbers, Fizz, Buzz, FizzBuzz.
Count how often each word appears using a dictionary.
Model a to-do list with a class — add tasks and check them off.
Rate passwords strong or weak using string methods.
A class with deposits, withdrawals, and a custom exception.