Little confusion with given list to identify the syntax issue

Question

Which line of code will cause an error?

num = [5, 4, 3, [2], 1]
print(num[0])
print(num[3][0])
print(num[5])

Ans: line4 but not sure why line 4 is causing error?

Answer 1

Because the length of the list is 5 and num[5] does not exist.

Answer 2

Abhi here is a minor edit to your code and a little help explain position in the array
https://code.sololearn.com/cn243ms9vQtN/?ref=app

Answer 3

The number in the list with 0 position is 5.

And the number(list) in position 3 is [2] and the number in 0 position in this list ( [2] ) is 2.

And the print(num[5]) is out of range ... There are only 5 elements in the list(till position 4).

Remember that the counting of position starts from 0.

Answer 4

index starts from 0 here index range is 0 to 4

print(num[5]) this line try to access index 5 , it's out of range
That's why it's giving error

Answer 5

[2] means index of 2

num = [5,4,3,[2],1]
0 ,1,2,3 ,4

Value in index 2 is 3
So it's printing value 3

Answer 6

Abhi [2] is like a list within a list... It is a list in the list 'num' with 1 element.

Answer 7

Thanks all of you but may I know the meaning of [2] in the list ?

as the list given as num = [5, 4, 3, [2], 1] so not sure how to understand [2] in this list while writing a code?