Why does modifying a list while iterating over it in Python skip elements? [duplicate]

I'm trying to remove items from a list while iterating through it, but I'm getting unexpected behavior where some elements are skipped.

Here's my code:

numbers = [1, 2, 3, 4, 5, 6, 7, 8] for num in numbers: if num % 2 == 0: # Remove even numbers numbers.remove(num) print(numbers)

Expected output: [1, 3, 5, 7]

Actual output: [1, 3, 5, 7, 8]

The number 8 is not being removed. When I print inside the loop, I can see that the iteration is skipping over certain elements after a removal.

Why does this happen? What's the correct way to remove items from a list while iterating over it?