![]() This process continues until all elements in the array have been processed, and the final value of total is returned by the reduce() method. In each iteration of the reduce() method, the callback function adds the current element ( num) to the accumulator ( total), and the result of this operation is stored in the total variable. The num argument is the current element being processed in the array. The total argument is the accumulator, which accumulates the result of the callback function as the reduce() method iterates over the elements of the array. In this example, the reduce() method is called on the numbers array and is passed a callback function that takes two arguments: total and num. Here is an example of using the reduce() method to sum the elements of an array: const numbers = Ĭonst sum = numbers.reduce((total, num) => total + num) ![]() This method is often used for tasks such as summing the elements of an array or calculating the average of the elements in an array. The reduce() method in JavaScript is used to apply a function to each element in an array, with the purpose of reducing the array to a single value.
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