Welcome to Module 4: Loops and Iteration, where we unlock one of the most powerful features in programming—repetition with purpose.
Loops allow you to write code that runs multiple times without duplication. Whether you’re displaying a list of items, processing user input, or running calculations, loops let you automate repetitive tasks with ease.
This module will help you understand when and how to use different types of loops in JavaScript, and how they fit into real-world development.
What You’ll Learn
By the end of this module, you’ll be able to:
- Understand what loops are and why they’re so useful in programming
- Use different types of loops:
for,while, anddo...while - Control loop execution with
breakandcontinue - Loop through arrays and other collections of data
- Apply loops to solve real-world problems and automate logic
What’s Inside
- Lesson 1: The
forLoop
Perfect for situations when you know how many times to repeat something. - Lesson 2: The
whileLoop
Great for loops that continue as long as a condition stays true. - Lesson 3: The
do...whileLoop
Ensures your code runs at least once—ideal for checking user input or defaults. - Lesson 4:
breakandcontinue
Learn how to exit or skip loop cycles for more control over your logic. - Lesson 5: Looping Through Arrays
Master one of the most common tasks: iterating over lists of data.
Why Loops Matter
Without loops, you’d be stuck copying and pasting the same code over and over. With loops, your programs become more powerful, flexible, and efficient—and that’s what professional developers rely on every day.
This module is packed with clear examples, practice problems, and mini quizzes to help you build confidence and code smarter.
