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Exercise 5

Print all of the even numbers in the following list of nested lists. Don't use any while loops.

my_list = [
    [1, 3, 6, 11],
    [4, 2, 4],
    [9, 17, 16, 0],
]
6
4
2
4
16
0

Solution

my_list = [
    [1, 3, 6, 11],
    [4, 2, 4],
    [9, 17, 16, 0],
]

for nested_list in my_list:
    for number in nested_list:
        if number % 2 == 0:
            print(number)

That may not have been too easy. Nested loops are hard to think about, but you'll encounter them often enough to have dreams about them. We start by iterating over the nested lists inside my_list. That means nested_list takes on the values [1, 3, 6, 11], [4, 2, 4], and [9, 7, 16, 0] as the iteration proceeds. We then iterate over the numbers in the current nested list during each iteration. Finally, we print the even numbers.

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