def sumDiagonals(matrix):
sumDiagonalLeft = 0
sumDiagonalRigth = 0
rows = len(matrix);
cols = len(matrix[0]);
for i in range(0, rows):
sumDiagonalLeft += matrix[i][i]
sumDiagonalRigth += matrix[i][cols - i - 1]
print("sumDiagonalLeft =", sumDiagonalLeft)
print("sumDiagonalRigth =", sumDiagonalRigth)
return sumDiagonalLeft + sumDiagonalRigth
matrix = [[1, 2, 3, 4, 0],
[5, 6, 100, 8, 1],
[2, 100, 8, 100, 3],
[1, 7, 100, 9, 6],
[9, 10, 11, 12, 13]]
print(sumDiagonals(matrix))
# sumDiagonalLeft = (1 + 6 + 8 + 9 + 13) = 37
# sumDiagonalRigth = (0 + 8 + 8 + 7 + 9) = 32
# 37 + 32 = 69
'''
run:
sumDiagonalLeft = 37
sumDiagonalRigth = 32
69
'''
