Suggest an editImprove this articleRefine the answer for “Why does a hash table provide fast access to data?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)A **hash table** provides fast access to data because it does not search elements sequentially, like a list, but instead computes their address directly using a hash function. **Key point:** instead of scanning all elements (O(n)), only a single computation and a single memory access happen (O(1) on average).Shown above the full answer for quick recall.Answer (EN)ImageA hash table provides fast access to data because **it does not search elements sequentially**, like a list, but **computes their address directly** using a hash function. **How this happens:** 1. When looking up an element, its **key** is taken. 2. The hash function computes an **index**, the position where this element should be. 3. The table accesses that slot directly and returns the value. So instead of scanning all elements (**O(n)**), only a single computation and a single memory access happen (**O(1)** on average). **Example:** ```javascript table["apple"] → hash("apple") → 57 → slot #7 → value found ``` The speed comes from the fact that **lookup reduces to an arithmetic operation**, rather than comparing keys one by one. > Exception: when collisions occur, the time can grow, but with a good hash function and a correct implementation the average complexity stays **O(1)**.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.