Suggest an editImprove this articleRefine the answer for “What are a key and a value in a hash table?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)In a hash table, each element is stored as a **"key -> value" pair**: the **key** is a unique identifier used to look up data, and the **value** is the actual data being stored or retrieved. **Key point:** keys do not repeat - adding an element with the same key overwrites the old value.Shown above the full answer for quick recall.Answer (EN)ImageIn a hash table, each element is stored as a **"key -> value" pair**. **Key** is a unique identifier used to look up data. It passes through a **hash function**, which computes the index of the slot where the associated value is stored. Keys do not repeat: adding an element with the same key overwrites the old value. **Value** is the actual data that needs to be stored or retrieved. The corresponding value can be found quickly by its key. **Example:** ```javascript { "name": "Maria", "age": 25, "city": "Kyiv" } ``` - `"name"`, `"age"`, `"city"` are the **keys**, - `"Maria"`, `25`, `"Kyiv"` are the **values**. The hash function turns a key, for example `"city"`, into an index, to instantly find `"Kyiv"`.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.