Python Program to Multiply Two Matrices

 # Program to multiply two matrices using nested loops

# 3x3 matrix

X = [[12,7,3],

    [4 ,5,6],

    [7 ,8,9]]

# 3x4 matrix

Y = [[5,8,1,2],

    [6,7,3,0],

    [4,5,9,1]]

# result is 3x4

result = [[0,0,0,0],

         [0,0,0,0],

         [0,0,0,0]]

# iterate through rows of X

for i in range(len(X)):

   # iterate through columns of Y

   for j in range(len(Y[0])):

       # iterate through rows of Y

       for k in range(len(Y)):

           result[i][j] += X[i][k] * Y[k][j]

for r in result:

   print(r)

Source Code: Matrix Multiplication Using Nested List Comprehension

# Program to multiply two matrices using list comprehension

# 3x3 matrix

X = [[12,7,3],

    [4 ,5,6],

    [7 ,8,9]]

# 3x4 matrix

Y = [[5,8,1,2],

    [6,7,3,0],

    [4,5,9,1]]

# result is 3x4

result = [[sum(a*b for a,b in zip(X_row,Y_col)) for Y_col in zip(*Y)] for X_row in X]

for r in result:

   print(r)

Output

[114, 160, 60, 27]
[74, 97, 73, 14]
[119, 157, 112, 23]