JavaScript Fundamentals · Functions · Lesson 14 of 48
Arrow Functions
Concept
Arrow Functions
Arrow functions are a shorter syntax for writing functions, especially handy for short, one-line logic.
When the function body is a single expression, you can even drop the curly braces and the return keyword — the expression's value is returned automatically.
- Explain the core idea behind Arrow Functions.
- 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 Arrow Functions. 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
Rewrite the greet function from the first lesson as an arrow function.
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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