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Python Basics · Functions · Lesson 13 of 36

Return Values

Concept

Return Values

return sends a value back to the caller and immediately ends the function. Without it, a function returns None.

A function can return multiple values at once as a tuple, which the caller can then unpack into separate variables.

By the end of this lesson
  • Explain the core idea behind Return Values.
  • Predict output before running a change.
  • Test one realistic and one unusual input.
  • Use the result to make the next decision.
How to study this page
  1. 1. Read one concept.
  2. 2. Change the example.
  3. 3. Run, compare, and explain.
  4. 4. Complete the challenge below.
ExampleRunnable
def add(a, b):
    return a + b

total = add(3, 4)
print(total)
Try it Yourself »
Returning multiple values
def min_max(numbers):
    return min(numbers), max(numbers)

low, high = min_max([4, 1, 9, 2])
print(low, high)
Self-check before continuing

Without looking at the example, describe what changes when you modify one input in Return Values. Then reopen the editor and prove your explanation with a small test.

You are ready to continue when you can predict, test, and explain the result.

Your turn

Write a function that returns both the sum and the product of two numbers as a tuple.

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Console

Output will appear here...