A structure can be nested inside a union and it is called union of structures. It is possible to create a union inside a structure.
Read moreHow do unions work in C?
A union is a special data type available in C that allows to store 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-purpose.
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