Javascript Program for Reversal algorithm for right rotation of an array

// JavaScript program for right rotation of 
// an array (Reversal Algorithm)

/*Function to reverse arr[] 
from index start to end*/
function reverseArray(arr, start, end) {
    while (start < end) {
        let temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
        start++;
        end--;
    }
    return arr;
}

/* Function to right rotate arr[]
of size n by d */
function rightRotate(arr, d, n) {
    arr = reverseArray(arr, 0, n - 1);
    arr = reverseArray(arr, 0, d - 1);
    arr = reverseArray(arr, d, n - 1);
    return arr;
}

// driver code
let arr = [1, 2, 3, 4, 5,
    6, 7, 8, 9, 10];

let n = arr.length;
let k = 3;

arr = rightRotate(arr, k, n);
console.log(arr.join(" "));