Insertion Sort
Detailed guide and Python implementation for the 'Insertion Sort' problem.
Problem Statement
Write a function insertion_sort(arr) that sorts a list of integers arr in ascending order using the Insertion Sort algorithm and returns the sorted list.
- •0 <= len(arr) <= 500
- •-10^4 <= arr[i] <= 10^4
Examples
arr = [4, 3, 2, 10, 12, 1, 5, 6]
[1, 2, 3, 4, 5, 6, 10, 12]
Elements are sequentially inserted into their correct positions in the sorted portion of the array.
arr = [3, 1, 2]
[1, 2, 3]
1 is inserted before 3 -> [1, 3, 2], then 2 is inserted between 1 and 3 -> [1, 2, 3].
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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