Definition

A Hash Table stores data using a value computed from a key through a hash function. Thanks to the hash function, knowing the key lets you instantly calculate the data location, enabling O(1) average search/insert/delete. 📌 This visualization uses the simple "division method" for education: • String → ASCII code sum → remainder by table size • Ex: "apple" → 97+112+112+108+101=530 → 530%7=bucket 5

Key Characteristics

• ✓Key-Value Storage: Each data is stored with a unique key for fast access by key.
• ✓Hash Function: Converts key to bucket number. Various methods: division, multiplication, polynomial hash, etc.
• ✓Collision Handling: Different keys can map to same bucket. Resolved by chaining (linked list).
• ✓ASCII Code: Converts characters to numbers. a=97, b=98, ... These numbers are used in hash calculation.

Time Complexity