雜湊法(Hashing)的搜尋與一般的搜尋法(searching)是不一樣的。在雜湊法中，鍵值(key value)或識別字(identifier)在記憶體的位址是經由函數(function)轉換而得的。此種函數，一般稱之為雜湊函數(Hashing function)或鍵值對應位址轉換(key to address transformation)。對於有限的儲存空間，能夠有效使用且在加入或刪除時也能快的完成，利用雜湊法是最適當不過了。因為雜湊表搜尋在沒有碰撞(collision)及溢位(overflow)的情況下，只要一次就可擷取到。-Hash method (Hashing) search and general search method (searching) is not the same. In the hash law, the key (key value) or identifier (identifier) address in memory by the function (function) derived from the conversion. Such a function, commonly known as hash function (Hashing function) or key corresponds to the address converter (key to address transformation). For a limited storage space, can be used effectively and in time to add or delete can be completed faster, the use of hash is the most appropriate of all. Because the hash table search in the absence of a collision (collision) and overflow (overflow) circumstances, as long as one can be retrieved.