CP : Union in C

Union in C

Unions are conceptually similar to structures. The syntax to declare/define a union is also similar to that of a structure. 

The only differences are in terms of storage. In structure each member has its own storage location, whereas all members of union uses a single shared memory location which is equal to the size of its largest data member.

This implies that although a union may contain many members of different types, it cannot handle all the members at the same time. A union is declared using the union keyword.

Structure vs. Union