I am attempting to do this leetcode problem here: Loading...

I am having trouble with this wording…the way it is worded is throwing me off.

" Given an integer array `nums`

of length `n`

, you want to create an array `ans`

of length `2n`

where `ans[i] == nums[i]`

and `ans[i + n] == nums[i]`

for `0 <= i < n`

(**0-indexed**)."

What does it mean by "of length 2n?