What is a Hash Table?

In computer science, a hash table, or a hash map, is a data structure that associates keys with values. The primary operation it supports efficiently is a lookup: given a key (e.g. a person's name),...

A hash table is a way to find data in an array, when you have a known key and an unknown value that corresponds to the key. You use a hashing function on the key to create an index into the hash...

lookup is nothing but searching.if you give a key it searches the corresponding value .

HashMap The HashMap gives you an unsorted, unordered Map. When you need a Map and you don't care about the order (when you iterate through it), then HashMap is the way to go; the other maps add a...

Well hash tables can store any type of data be it the fundamental data types like int, float, char or derived data types like structure , strings etc Implementation in C++ at the Related link below.