Question

19. Write a for-loop to perform each of the following actions Print out every item in a 2D list Print out the first letter in the first item in a list, 2nd letter in the 2nd item in the list, 3rd letter in the 3rd item, etc Create a 4x4 2D list that counts up from 1-16 . . o Writ ach ofthese fnetions and correctlv use them in mainQ:

Please use Pyton 3

Answer 1

ll = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

# 1
for l in ll:
    for num in l:
        print(num, end='\t')
    print()

# 2
for i in range(len(ll)):
    for j in range(len(ll[i])):
        if i == j:
            print(ll[i][j])

# 3
new_list = []
for i in range(4):
    tmp = []
    for j in range(4):
        tmp.append((i * 4) + (j + 1))
    new_list.append(tmp)
print(new_list)

7 [[1, 2, 3, 4],[5, 6, 7, 81, [9, 10, 11, 12], [13, 14, 15, 16]]