can someone tell me some about hash table?

[wbgxx]

I'm a freshman and have study algorithm not 1 month,can some tell me more about hash table?thanks!

[daveftl]

Hash table ..is a kind of data structure that uses hash function to map the index to the values.

[RedSon]

Also, Google could have told you that in 0.32 seconds. Why don't you try Google for all your general knowledge questions, then ask us specific questions that you can't find an easy answer for.