Python Basics · Variables & Types · Lesson 6 of 36
f-strings
Concept
f-strings
f-strings let you embed variables directly inside a string using curly braces.
You can put any expression inside the braces, not just a variable name — including function calls and arithmetic, which get evaluated and inserted automatically.
- Explain the core idea behind f-strings.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in f-strings. 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
Use an f-string to print a sentence combining three variables.
Ask about this lesson or your next move. The guide explains the path without taking the work away from you.
Ready for the next lesson?
Mark this lesson complete when you have finished the exercise.
Console