What is JavaScript Array reduce() Method? Introduction - In this article, we will talk about the javascript reduce method. At the end of this article, we will gain valuable insight into where to use the reduce method. To better understand the reduce method you can use the online javascript editors to execute the examples. For example - 1. https://onecompiler.com/javascript 2. https://jsfiddle.net/ Reduce Operation - Before diving into what is the use of the reduce() method. let's find distinguish what problem it tries to solve: reducing an array to a value. Reducing an array means performing a concrete accumulative operation on its items to calculate a result value. A good example of reduce operation is calculating the sum of an array, where the accumulative operation is the addition of items. For an array [5, 2, 9, 4] reducing to a sum results in 20. Reduce Method - This is an array method that operators on the array. Used to reduce the array to a single va...