JavaScript Array Iteration

JavaScript arrays are a fundamental part of the language, offering a versatile way to store and organize data. When it comes to working with arrays, iteration is a crucial concept. In this article, we will delve into JavaScript array iteration, exploring different methods and providing practical examples to illustrate their usage.

1. for Loop: The traditional for loop is a fundamental way to iterate over arrays. It allows you to loop through each element in an array and perform specific actions.

   let numbers = [1, 2, 3, 4, 5];
   for (let i = 0; i < numbers.length; i++) {
       console.log(numbers[i]);
   }

2. forEach Method: The forEach method is a more modern and expressive way to iterate through arrays. It simplifies the code and makes it more readable.

   let fruits = ['apple', 'banana', 'orange'];
   fruits.forEach((fruit) => {
       console.log(fruit);
   });

3. map Method: The map method creates a new array by applying a function to each element of the existing array. It is particularly useful when you want to transform the elements of an array.

   let numbers = [1, 2, 3, 4, 5];
   let squaredNumbers = numbers.map((num) => num * num);
   console.log(squaredNumbers);

4. filter Method: The filter method is handy for creating a new array containing only elements that meet a specified condition.

   let scores = [75, 80, 95, 60, 85];
   let highScores = scores.filter((score) => score > 80);
   console.log(highScores);

5. reduce Method: The reduce method is powerful for accumulating values and reducing an array to a single result.

   let numbers = [1, 2, 3, 4, 5];
   let sum = numbers.reduce((accumulator, current) => accumulator + current, 0);
   console.log(sum);

Conclusion:

JavaScript array iteration methods provide a variety of ways to manipulate and work with arrays efficiently. Whether you’re iterating for simple logging, transforming elements, filtering data, or accumulating values, there’s a method suited for every need. Understanding and mastering these array iteration techniques will undoubtedly enhance your ability to work with arrays in JavaScript.