Question

How to print diagonals of a 2D list in Python

Answer 1

def print_diagonals(list2d):
    size = len(list2d)
    
    primary = [list2d[i][i] for i in range(size)] 
    print(primary) 
    
    secondary = [list2d[i][size - 1 - i] for i in range(size)]
    print(secondary)  


list2d = [[ 1, -1, 77],
	      [-2, 88, -3],
	      [99, -4,  3]]
	
print_diagonals(list2d)



'''
run:

[1, 88, 3]
[77, 88, 99]

'''

 

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