Overview of supported operations

Now that we know what a hash table is and how it works using a hash function and internal array, we can dive a bit deeper and understand the different operations that can be performed on it. Every data structure has its special powers, and for a hash table, it is ultra-fast storage and retrieval of mappings(key-value pairs). Below are the primary operations on a hash table and their high-level working.

Insert operation

The insert operation is one of the primary operations on a hash table and is used to store a key-value mapping. A key-value mapping is stored by hashing the key to get the index in the internal array and storing the key-value pair at that location. If the key is already present in the table, its value is updated to the new value.