Program to multiply 2x2 matrices.

matrix_multiply.py

# Program to multiply 2x2 matrices. Developed By Syed Shehroz Ali #

# Welcome Line
print("\n---| Multiplication of 2x2 Matrices | ---\n")

# 2D List for matrices
A = [[], []]
B = [[], []]

# Ask for Matrix A values
print("\tMATRIX A\n\t--------\n")
for row in range(2):

    # For each row, get 2 column values
    column1, column2 = input("\t").split()

    # Insert into nested list
    A[row].insert(0, eval(column1))
    A[row].insert(1, eval(column2))

# Ask for Matrix B values
print("\n\tMATRIX B\n\t--------\n")
for row in range(2):

    # For each row, get 2 column values
    column1, column2 = input("\t").split()

    # Insert into nested list
    B[row].insert(0, eval(column1))
    B[row].insert(1, eval(column2))

# Print A x B
print("\n\tA x B\n\t--------\n")

# 2D List to store A x B
matrix = [[], []]

# For each row
for row in range(2):

    # For each column
    for column in range(2):

        # 1st Iteration
        if row == 0 and column == 0:

            val = (A[row][column] * B[row][column]) + (A[row][column + 1] * B[row + 1][column])
            matrix[row].insert(column, val)

        # 2nd Iteration
        if row == 0 and column == 1:

            val = (A[row][column - 1] * B[row][column]) + (A[row][column] * B[row + 1][column])
            matrix[row].insert(column, val)

        # 3rd Iteration
        if row == 1 and column == 0:

            val = (A[row][column] * B[row - 1][column]) + (A[row][column + 1] * B[row][column])
            matrix[row].insert(column, val)

        # 4th Iteration
        if row == 1 and column == 1:

            val = (A[row][column - 1] * B[row - 1][column]) + (A[row][column] * B[row][column])
            matrix[row].insert(column, val)

# Print whole matrix (A x B)
for row in matrix:

    for column in row:

        print("\t", end="")
        print(column, end="")

    print()

# Print new-line, end.
print()