What is the reduce function in JavaScript?

Can you explain what the reduce function does in JavaScript?

Sure! The reduce function in JavaScript is used to execute a reducer function on each element of an array, resulting in a single output value.

Can you give me an example of how to use the reduce function?

Absolutely! Here's a simple example:

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

What does the second argument in reduce do?

The second argument in the reduce function is the initial value for the accumulator. In the example, it's set to 0.

Can reduce be used for other operations besides summing?

Yes, definitely! The reduce function can be used for various operations like finding the maximum value, flattening arrays, or even counting occurrences.