Writing your own functions
def, parameters, return values and default arguments.
Lesson 6 of 6 10 min
You will learn
- Define and call a function
- Return a value
- Use default parameter values
Define once, use many times
A function is a named recipe. def creates it, the values in brackets are its inputs (parameters), and return sends the answer back.
Python · try it
Output appears here · Ctrl + Enter to run
Checkpoint
1. What does simple_interest(2000, 5, 2) return?
2. Why does is_prime only test divisors while d * d <= n?