Left Rotation Array

   Left Rotation:

A left rotation operation on an array shifts each of the array's elements  unit to the left. For example, if  left rotations are performed on array , then the array would become . Note that the lowest index item moves to the highest index in a rotation. This is called a circular array.

Given an array  of  integers and a number, , perform  left rotations on the array. Return the updated array to be printed as a single line of space-separated integers.

Function Description

Complete the function rotLeft in the editor below.

rotLeft has the following parameter(s):

• int a[n]: the array to rotate
• int d: the number of rotations

Returns

• int a'[n]: the rotated array

Input Format

The first line contains two space-separated integers  and , the size of  and the number of left rotations.
The second line contains  space-separated integers, each an .

Constraints

Sample Input

5 4
1 2 3 4 5

Sample Output

5 1 2 3 4

Explanation

When we perform  left rotations, the array undergoes the following sequence of changes:

function rotLeft(a, d) {

    for(let i=0;i<d;i++){

        let lastElement=a[a.length-1];

        for(let j=0;j<a.length-1;j++){

            let updatedIndex=(j+a.length-1)%(a.length);

            a[updatedIndex]=a[j];

        }

         a[a.length-2]=lastElement;

    }

    return a;

}

   //OR

function rotLeft(a, d) {

    if(d==a.length)

        return a;

    else if(d>a.length)

        d=d%a.length;

      let newArr= a.splice(d,a.length)

     newArr= newArr.concat(a);

    return newArr;

}