Rotate array matrix by 90 degree

[Question] : Given a 2D matrix, your task is to rotate the matrix 90 degrees clockwise.
Input: –  [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
Output –  [[7, 4, 1], [8, 5, 2], [9, 6, 3]]

func rotateMatrix(_ matrix: inout [[Int]]) {
    var rows = matrix.count
    var columns = rows
    
    //transpose of Matrix
    for row in 0..<rows {
        for column in row..<columns {
            let temp = matrix[row][column]
            matrix[row][column] = matrix[column][row]
            matrix[column][row] = temp
        }
    }
    
    for row in 0..<rows {
        matrix[row].reverse()
    }
}

var matrixToRotate =  [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
rotateMatrix(&matrixToRotate);
print("Rotated matrix output-->", matrixToRotate)//  [[7, 4, 1], [8, 5, 2], [9, 6, 3]]