How to use reduce() function In Javascript

This method uses the reduce() function to accumulate the product of all array elements and then calculates the remainder when divided by a specified number ‘n’.

The reduce() method executes a reducer function on each element of the array, resulting in a single output value. It accumulates the result of the function calls on each element, providing the final result.

Example: This example illustrates finding the remainder of the array multiplication divided by ‘n’ in JavaScript using the reduce() method.

Javascript

function findRemainder2(arr, n) {
    let product = arr.reduce((acc, val) => {
        acc * val, 1
    });
    return product % n;
}
 
let arr2 = [4, 8, 6, 2];
let n2 = 13;
console.log(findRemainder2(arr2, n2));

Output

NaN

Time Complexity: O(n)

Space Complexity: O(1)

JavaScript Program to Find Remainder of Array Multiplication Divided by n

In JavaScript, the remainder of the array multiplication when divided by the number n can be found by iteration, functional programming or array reduction. , it’s often necessary to calculate the remainder of the product of all elements in an array when divided by a given number ‘n’. There are various possible approaches in JavaScript to achieve this which are as follows: