Sum of opposite/minor diagonal elements of a matrix¶

In [1]:

s = int (input("Enter the size of the matrix: "))

​

print("Enter the elements of the matrx: ")

​

A = []

​

for i in range(0, s):

    row = []

    for j in range(0, s):

        row.append(int(input()))

    A.append(row)

​

print ('The entered matrix is: ')

for i in range(0, s):

    for j in range(0, s):

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

    print()

print ('Sum of opposite/minor diagonal elements of the matrix is: ')

sum = 0

​

for i in range(0, s):

    for j in range(0, s):

        if (i + j) == (s - 1):

            sum = sum + A[i][j]

print (sum)

​

Enter the size of the matrix: 3
Enter the elements of the matrx: 
3
2
3
4
3
4
5
4
6
The entered matrix is: 
3 2 3 
4 3 4 
5 4 6 
Sum of opposite/minor diagonal elements of the matrix is: 
11