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JavaScript - Iterating an array with index and element

By IncludeHelp Last updated : January 21, 2024

Problem statement

Given a JavaScript Array, you have to iterate the given with index and element.

Iterating an array with index and element

To iterate an array with index and element, you can use the for ... of loop with Array.entries() method. The Array.entries() method creates an Iterator of this array to iterate over the key/value pairs.

JavaScript code to iterate an array with index and element

The following code iterates an array (arr), and extracts and prints the index and elements.

// creating an array
const arr = ["New Delhi", "New York", "California", "London"];

// Iterating an array with index and element
for (const [key, value] of arr.entries()) {
  console.log(key, value);
}

Output

The output of the above code is:

0 'New Delhi'
1 'New York'
2 'California'
3 'London'

To understand the above example, you should have the basic knowledge of the following JavaScript topics:

• JavaScript Basic Syntax
• JavaScript Arrays
• JavaScript Loops