Example: Rotate Matrix 90 degrees Clockwise Python Program

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# It's the function to rotate

# the matrix 90 degree clock-wise

def rotate90DegClockwise(arru, N):

    pass

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    # It will traverse the each cycle

    for i in range (int (N / 2)):

        for j in range (i, int (N - i - 1)):

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            # It will swap elements of each cycle in clock-wise direction

            temp = arru[i][j]

            arru[i][j] = arru[N - 1 - j][i]

            arru[N - 1 - j][i] = arru[N - 1 - i][N - 1 - j]

            arru[N - 1 - i][N - 1 - j] = arru[j][N - 1 - i]

            arru[j][N - 1 - i] = temp

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# It's the function for printing the rotated matrix

def printMatrix(arru, N):

    pass

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    for i in range (N):

        print (end="\t")

        for j in range (N):

            print (arru[i][j], end="\t")

        print (end="\n\n")

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# This is the driven calculation of matrix rotation

arru = [

    [13, 13, 17, 11],

    [25, 26, 27, 28],

    [39, 30, 31, 31],

    [43, 44, 45, 46]

]

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# This will print the matrix before rotation

print ("-----The input matrix before 90 degrees clock-wise rotation-----\n")

printMatrix(arru, 4)

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# This function will be rotate each element clock-wise

rotate90DegClockwise(arru, 4)

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