Javascript Program for Rotate the matrix right by K times

// Javascript program to rotate a matrix 
// right by k times    


// size of matrix
let M = 3;
let N = 3;

// function to rotate matrix by k times
function rotateMatrix(matrix, k) {
    // temporary array of size M
    let temp = Array(M).fill(0);

    // within the size of matrix
    k = k % M;

    for (i = 0; i < N; i++) {

        // copy first M-k elements
        // to temporary array
        for (t = 0; t < M - k; t++)
            temp[t] = matrix[i][t];

        // copy the elements from k
        // to end to starting
        for (j = M - k; j < M; j++)
            matrix[i][j - M + k] = matrix[i][j];

        // copy elements from
        // temporary array to end
        for (j = k; j < M; j++)
            matrix[i][j] = temp[j - k];
    }
}

// function to display the matrix
function displayMatrix(matrix) {
    for (i = 0; i < N; i++) {
        let output = '';
        for (j = 0; j < M; j++)
            output += matrix[i][j] + " ";
        console.log(output);
    }
}

// Driver code

let matrix = [
    [12, 23, 34],
    [45, 56, 67],
    [78, 89, 91]];
let k = 2;

// rotate matrix by k
rotateMatrix(matrix, k);

// display rotated matrix
displayMatrix(matrix);