In programming, loops are used to repeat a block of code multiple times. Instead of writing the same code again and again, a loop allows you to run it automatically as long as a condition is true.
Loops save time, reduce errors, and make programs more powerful. They are commonly used when working with lists, counting numbers, and performing repetitive tasks.
Learning loops is an important step in becoming a confident JavaScript developer.
Why Loops Are Important
- They reduce repeated code
- They make programs shorter and cleaner
- They help process large amounts of data
- They automate repetitive tasks
- They are used in almost every real application
Without loops, writing large programs would be slow and difficult.
This example prints the same message three times, but the code is repeated. If you want to print the message 100 times, this method is not practical.
This shows why loops are necessary.
Here, the loop runs the same code three times automatically. The variable i controls how many times the loop runs.
This shows how loops make code shorter and easier to manage.
This example shows how loops are used to count numbers and repeat actions.
By understanding loops, students gain the ability to write efficient programs that handle repetition and prepare themselves for advanced topics like arrays, functions, and algorithms.