Multiplication of two matrices in python with user input

 

Multiplication of two matrices in python¶

In [1]:

m = int (input('Enter the number of rows of the first matrix: '))

n = int (input('Enter the number of columns of the first matrix: '))

p = int (input('Enter the number of rows of the second matrix: '))

q = int (input('Enter the number of columns of the second matrix: '))

if n != p:

    print ('Multiplication is not possible, because the number columns of the first matrix and the number of rows of the second matrix is not same')

else:

    print ('Multiplication is possible: ')

    A = []

    print ('Enter the elements of the first matrix: ')

    for i in range(0, m):

         r = []

         for j in range(0, n):

             r.append(int (input()))

         A.append(r)

    B = []

    print ('Enter the elements of the second matrix: ')

    for i in range(0, p):

         r = []

         for j in range(0, q):

             r.append(int (input()))

         B.append(r)

    #Assign value of each elements of the result matrix

    mul = []

    for i in range(0, m):

        x = []

        for j in range(0, q):

            x.append(0)

        mul.append(x)

​

    # Applying multiplication formula

    for i in range(0, m):

        for j in range(0, q):

            for k in range(0, n):

                mul[i][j] = mul[i][j] + (A[i][k] * B[k][j])

​

    print ('First matrix is: ')

    for i in range(0, m):

        for j in range(0, n):

            print(A[i][j], end = " ")

        print()

    print ('Second matrix is: ')

    for i in range(0, p):

        for j in range(0, q):

            print(B[i][j], end = " ")

        print()

    print ('Multiplication of the two marix is: ')           

    for i in range(0, m):

        for j in range(0, n):

            print(mul[i][j], end = " ")

        print()

​

Enter the number of rows of the first matrix: 2
Enter the number of columns of the first matrix: 3
Enter the number of rows of the second matrix: 3
Enter the number of columns of the second matrix: 4
Multiplication is possible: 
Enter the elements of the first matrix: 
2
3
4
3
4
5
Enter the elements of the second matrix: 
3
4
5
6
2
3
4
5
1
2
3
4
First matrix is: 
2 3 4 
3 4 5 
Second matrix is: 
3 4 5 6 
2 3 4 5 
1 2 3 4 
Multiplication of the two marix is: 
16 25 34 
22 34 46