STL Containers

STL (Standard Template Library) containers are pre-built data structures in programming that organize and store data efficiently. Think of them as digital storage boxes—like lists, tables, or sets—that help programmers manage information such as numbers, words, or objects. These containers provide ready-made ways to insert, delete, and access data quickly, saving developers from building these structures from scratch. Common examples include vectors (dynamic arrays), lists, maps (associative arrays), and sets. They are flexible, optimized, and widely used in programming to handle data in an organized, predictable manner.