JavaScript Array Iterations: How forEach and map Work Differently

JavaScript offers multiple methods to iterate over arrays, with forEach and map being among the most commonly used. The forEach method is designed for performing side effects such as logging values, updating UI elements, or making API calls, but it does not return a new array. In contrast, the map method is used to transform or modify array elements, returning a brand-new array without altering the original. Both methods accept a callback function that receives the current element, its index, and the original array as arguments. Understanding when to use each method is key to writing cleaner and more predictable JavaScript code.