What is the purpose of the Reduce method in programming?

The reduce method in programming is used for sequentially processing array elements to reduce them to a single value. It takes an accumulator function, which is applied to each element, and returns the final result.

In JavaScript (Node.js), reduce is often used for summing, merging, or transforming data.

Example of summing numbers in an array:

const numbers = [1, 2, 3, 4];
const sum = numbers.reduce((accumulator, current) => accumulator + current, 0);
console.log(sum); // 10

Here, accumulator holds the intermediate result, and current is the current array element.