Here you will learn a **simple Python 3 program to multiply two matrices**. Before moving ahead, make sure that you have a basic understanding of Python programming concepts such as if-else statements, for loops, lists, dictionaries, etc.

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## Python 3 Program To Multiply Two Matrices

Here is the flow of our Python program.

**Step 1**: Take input of the number of rows and columns for Matrix A and B.

**Step 2**: If columns of Matrix A is not equal to rows of matrix B, then the multiplication can’t be done, and the user will see the error message.

**Step 3**: If columns of matrix A = rows of matrix B, then user’s will be prompted to enter the elements of both the matrices one by one.

**Step 4**: After the user has specified all the elements, they will see matrix A, matrix B, and the multiplication result.

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Now, take a look at the source code and see how all those steps mentioned above are executed.

## Source Code

r1 = int(input("Enter number of row for Matrix A :")) c1 = int(input("Enter number of column for Matrix A :")) r2 = int(input("Enter number of row for Matrix B :")) c2 = int(input("Enter number of column for Matrix B :")) if c1 != r2: print("\nCan't Multiply --> To Multiply two matrix (A x B) ,Column of Matrix A = Row of Matrix B") else: print("Enter element row wise for matrix A :") A = [] for i in range(r1): arrA = [] for j in range(c1): arrA.append(int(input())) A.append(arrA) print("Enter element row wise for matrix B :") B = [] for i in range(r2): arrB = [] for j in range(c2): arrB.append(int(input())) B.append(arrB) print("Matrix A=") for w in A: print(w) print("matrix B=") for x in B: print(x) result = [] for i in range(r1): arrR = [] for j in range(c2): arrR.append(0) result.append(arrR) for i in range(len(A)): for j in range(len(B[0])): for k in range(len(B)): result[i][j] = A[i][k] * B[k][j] + result[i][j] print("AXB=") for y in result: print(y)

## Program output:

Enter number of row for Matrix A :2

Enter number of column for Matrix A :2

Enter number of row for Matrix B :2

Enter number of column for Matrix B :2

Enter element row wise for matrix A :

2

2

2

2

Enter element row wise for matrix B :

2

2

2

2

Matrix A=

[2, 2]

[2, 2]

matrix B=

[2, 2]

[2, 2]

AXB=

[8, 8]

[8, 8]

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