![]() ![]() The initial value is an optional argument that can be used to set the starting value for the first call to the callback function. The result of each call to the callback function is used as the input to the next call, and the final result of the last call is returned by the reduce function. ![]() The callback function is called on each element in the array, starting with the first element and continuing until all elements have been processed. It takes two arguments: a callback function and an optional initial value. The reduce function is a method that can be called on an array object in JavaScript. What is the reduce function and how does it work? In this article, we will cover the basics of how to use the reduce function and provide some examples to help you get started. It is a higher-order function, which means that it takes one or more functions as arguments and returns a new function. The reduce function in JavaScript is a powerful tool for transforming an array of values into a single value.
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