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

0 vote261 views1 answer
Sorting algorithms in python
Python
1 vote297 views1 answer
Np install python
Python
3 votes300 views1 answer
Pandas plotly
Python
6 votes257 views1 answer
Anaconda python update packages
Python
1 vote322 views1 answer
Python iterate through string in reverse
Python
0 vote278 views1 answer
Python time limit for input
Python
0 vote294 views1 answer
Show post id on django admin interface
Python Django
6 votes249 views3 answers
Python open folder
Python
0 vote263 views1 answer
Coger elementos de un string python expresiones regulares
Python
44 votes276 views6 answers
Pandas read csv file
Python