import numpy as np

matrix_A = np.random.randn(5, 5)   # a random 5x5 grid of numbers
matrix_B = np.random.randn(5, 5)   # another random 5x5 grid, same size

# matrix addition — the slow, manual way
output = np.zeros((5, 5))   # start with an empty 5x5 grid, all zeros

for i in range(matrix_A.shape[0]):        # walk through every row
    for j in range(matrix_A.shape[1]):    # walk through every column in that row
        output[i, j] = matrix_A[i, j] + matrix_B[i, j]   # add just these two numbers

print(output)

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