JavaScript Fundamentals · Conditions · Lesson 8 of 48
Switch Statements
Concept
Switch Statements
A switch statement is a cleaner way to handle many possible exact-match values for a single variable, instead of writing a long chain of else if statements.
- Explain the core idea behind Switch Statements.
- 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.
Good to know
Forgetting break is one of the most common switch bugs — without it, execution 'falls through' into the next case.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Switch Statements. 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 switch statement that logs a greeting in a different language based on a lang variable.
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.
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