Exam PCEP-30-02 topic 1 question 9 discussion

a[::2] = a[Start nothing: stop nothing, step 2= skip two ] so a = [1,2,3,4,5,6,7,8,9] start at 1, stop at nothing, step two so. Start 1 count 2,3 record, 4,5 record, 6,7 record, 8,9 record. So we have [1,3,5,7,9]

The output of the code snippet is: [1, 3, 5, 7, 9] Explanation: a[::2] uses Python slicing syntax: The first : indicates the starting point (default is the beginning of the list). The second : indicates the stopping point (default is the end of the list). The 2 after the second colon is the step size, which means it skips every second element. Starting from the first element (1), it selects every second element: 1, 3, 5, 7, 9.

a = [1,2,3,4,5,6,7,8,9] print(a[::2]) >> printing the whole list a by the step 2 >> a[0], a[2], a[4], a[6], a[8], remeber to start counting from 0

a is the correct answer

[start : stop : step] inclusive, exclusive respectively