Arrays become truly useful when you can process each element one by one. Looping through arrays allows you to read, display, and modify every value stored in the list.
In real-world applications, developers use loops with arrays to show product lists, calculate totals, validate data, and much more.
Learning how to loop through arrays is an essential skill for every JavaScript developer.
Common Ways to Loop Through Arrays
- Using for loop
- Using while loop
- Using for...of loop
- Using forEach() method
Each method has its own use case depending on the situation.
This example uses a for loop to go through each value in the marks array.
The loop runs from index 0 to the last element in the array.
The for...of loop gives you each value directly without using index numbers.
This makes the code shorter and easier to read.
These examples show different ways to loop through arrays and handle data.
By mastering array loops, students gain the ability to process lists of data and build dynamic features like reports, dashboards, and search results.