Simple Sorting: Bubble, Selection & Insertion

Sorting puts values in order, and many other algorithms depend on it: binary search needs sorted data, duplicates are easy to find in a sorted list, and results are easier to read.

In real code you'd call a built-in sort (Python's sorted() is an optimized O(n log n) algorithm called Timsort). Learning to write sorting algorithms teaches loops, swaps, invariants, and complexity — skills that transfer to every other algorithm.