break while an iteration and after an iteration

Question

In my 2 scripts it looks as the break statement can break out of the loop both: while the iteration process is running, and also after an iteration ends.
But I thought that break can merely break the loop while the iteration, and not after it.
I find it meaningful because the outputs vary depending on how the break functions with iterations.

list = [1,2,3,4,5]
for i in range(len(list)):
    if i ==1: 
        break 
    print("loop is broken")

output:

loop is broken

In the above example, according to the outcome, the break only breaks out of the loop after the first iteration ends.

list = [1, 2, 3, 4, 5]
for i in list:
    if i == 1:
        print("loop is broken")
        break
    print("string is not printed")

Output:

loop is broken

Now it contradicts the assumption that the break breaks only once the iterator finishes, otherwise string is not printed would have been printed.

Asked By: stuck overflawed

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Source

Answer 1

In your first code snippet, you use for i in range(len(list)): meaning that i will only equal 1 on the second iteration, so ‘loop is broken’ gets printed.

In the second code snippet, you use for i in list:, so i equals 1 on the first iteration, so only ‘loop is broken’ has a chance to get printed before the break.

Answered By: Telan

break while an iteration and after an iteration

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