Give me the best way to reverse the elements in the list [1,3,4,7,8,5,6,2,9] without using built-in functions in any language?

Answer 1

Please show us your attempt, so that we can see what you have done so far. So it would be nice, if you could link your code here. Thanks.

Answer 2

#python
a = list(range(10))
a = [a.pop() for _ in range(len(a))]

Anyway one possible algorithm is make a loop that goes from 0 to half of the list size. Swap the first element with the last. Then swap the second element with the second from the back. And so on. You can use a temp var for swapping.

Answer 3

shouldn't it be without built-ins? 🤔

Answer 4

Sudhakara Bathala Here we can do in Java like this

https://code.sololearn.com/c4cKNI5j4LjQ/?ref=app

Answer 5

Traverse the list backwards and copy each element into a new list.