Python Add Two Matrices

by Online Tutorials Library July 22, 2022

Python Program to Add Two Matrices

What is Matrix?

In mathematics, matrix is a rectangular array of numbers, symbols or expressions arranged in the form of rows and columns. For example: if you take a matrix A which is a 2×3 matrix then it can be shown like this:

Image representation:

In Python, matrices can be implemented as nested list. Each element of the matrix is treated as a row. For example X = [[1, 2], [3, 4], [5, 6]] would represent a 3×2 matrix. First row can be selected as X[0] and the element in first row, first column can be selected as X[0][0].

Let’s take two matrices X and Y, having the following value:

  X = [[1,2,3],      [4,5,6],      [7,8,9]]    Y = [[10,11,12],      [13,14,15],      [16,17,18]]  

Create a new matrix result by adding them.

See this example:

  X = [[1,2,3],         [4,5,6],         [7,8,9]]    Y = [[10,11,12],         [13,14,15],         [16,17,18]]    Result = [[0,0,0],                  [0,0,0],                  [0,0,0]]  # iterate through rows  for i in range(len(X)):     # iterate through columns     for j in range(len(X[0])):         result[i][j] = X[i][j] + Y[i][j]  for r in result:     print(r)  

Output:

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