Python diagonal sum

# A simple Python3 program to find
# sum of diagonals
MAX = 100
 
def printDiagonalSums(mat, n):
 
    principal = 0
    secondary = 0
    for i in range(0, n):
        principal += mat[i][i]
        secondary += mat[i][n - i - 1]
         
    print("Principal Diagonal:", principal)
    print("Secondary Diagonal:", secondary)
 
# Driver code
a = [[ 1, 2, 3, 4 ],
     [ 5, 6, 7, 8 ],
     [ 1, 2, 3, 4 ],
     [ 5, 6, 7, 8 ]]
printDiagonalSums(a, 4)
 
# This code is contributed
# by ihritik

Source: geeksforgeeks.org

Sum of diagonal numpy

arr= np.arange(16)
arr= np.reshape(arr,(4,4))

a=np.diagonal(arr, 0,0,1)

result=sum(a)
print(result)

-1

Source: numpy.org

Similar codes

2 votes318 views1 answer
Get input pandas
Python
0 vote367 views1 answer
Sort for Linked Lists python
Python
1 vote327 views1 answer
Show chrome devtools in selenium
Python
3 votes283 views1 answer
Find all index of element in list python
Python
0 vote344 views1 answer
./bootstrap command not found in dockerfile
Python
0 vote388 views4 answers
Download python turtle
Python
0 vote351 views2 answers
Sympy function definition
Python
10 votes326 views3 answers
Replace nan with mean
Python
12 votes324 views1 answer
Python chromedriver headless selenium
Python
0 vote356 views1 answer
How to read frame width of video in cv2
Python