Multiply Matrices in Python from User Inputs

• Python
• Matrix Operations
• Multiplication of Matrices

 

Python Scripts

r1 = int(input("Enter the no. of rows of first matrix : ")) c1 = int(input("Enter the no. of columns of first matrix : ")) r2 = int(input("Enter the no. of rows of second matrix : ")) c2 = int(input("Enter the no. of columns of second matrix : ")) #initialize the two matrices matrix1 = [[0] * c1 for i in range(r1)] # 0 matrix of size (r1,c1) matrix2 = [[0] * c2 for i in range(r2)] #enter the elements of the first matrix print("Enter the elements of the first matrix (separated by line):") for i in range(r1): for j in range(c1): matrix1[i][j] = int(input()) #enter the elements of the second matrix print("Enter the elements of the second matrix (separated by line):") for i in range(r2): for j in range(c2): matrix2[i][j] = int(input()) #initialize the result matrix result = [[0] * c2 for i in range(r1)] #multiply the two matrices for i in range(r1): for j in range(c2): for k in range(c1): result[i][j] += matrix1[i][k] * matrix2[k][j] #print the result matrix print("Result:") for i in range(r1): for j in range(c2): print(result[i][j], end=" ") print()

Output

Enter the no. of rows of first matrix : 3

Enter the no. of columns of first matrix : 3

Enter the no. of rows of second matrix : 3

Enter the no. of columns of second matrix : 3

Enter the elements of the first matrix (separated by line):

1

2

3

4

5

6

7

8

9

Enter the elements of the second matrix (separated by line):

1

2

3

4

5

6

7

8

9

Result:

30 36 42 

66 81 96 

102 126 150 

...Program finished with exit code 0

Press ENTER to exit console.