Union

A union is a special data type available in C that allows storing different data types in the same memory location. You can define a union with many members, but only one member can contain a value at any given time. Unions provide an efficient way of using the same memory location for multiple purposes.

Key Points :

• It is an user defined data type;
• Union is a collection of different type of memory but not in contiguous form;
• In union all member will share same location;
• Size of union depends upon the size of the largest member;

Syntax :

           union tagname 

                      {

                        member 1;

                        member 2;

                        member 3;

                        .

                        .

                        .

                       };