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JavaScript Foundations · Lesson 6 of 10
Functions
Learn how functions group instructions into reusable actions with names that make code easier to follow.
Starter
4 practice exercises
1 homework item
What you will learn
- Explain what a function is in plain English.
- Recognize the difference between defining a function and calling it.
- Read tiny reusable JavaScript examples without panic.
Lesson shape
14 minute lesson with 11 sections, 4 exercises, 8 checkpoint questions, and 1 homework submission.
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Lesson outline
What this lesson includes
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What a function is in plain English
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Why JavaScript uses functions
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Tiny example 1: show a welcome message
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Tiny example 2: update a piece of text
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Tiny example 3: run the same small action more than once
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Separate the parts of a function
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Why functions are useful
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Defining a function is not the same as calling it
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Common beginner mistakes with functions
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Short recap before lesson 7
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Homework
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Functions: quick check
Create a very small example or corrected snippet that demonstrates the main idea from Functions.
Keep moving
Finish this lesson, then move forward without losing your place.
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