You use a union when your “thing” can be one of many different things but only one at a time. You use a structure when your “thing” should be a group of other things.
Read moreHow does a union 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.
Read moreCan a union be nested in structure in C?
Nested Union is Union which has another Union as a member in that Union . A member of Union can be Union itself , this what we call as Nested Union.
Read moreCan a structure be nested in a union?
The answer is false. A union can be nested in a structure . Actually union and structure can be nested in each other which means that nesting union in structure and nesting structure in union, both are possible.
Read moreCan a structure be nested in a union?
The answer is false. A union can be nested in a structure . Actually union and structure can be nested in each other which means that nesting union in structure and nesting structure in union, both are possible.
Read moreWhat is the advantage of union in C?
Advantages of union When you use union, only the last variable can be directly accessed . Union is used when you have to use the same memory location for two or more data members. It enables you to hold data of only one data member. Its allocated space is equal to maximum size of the data member.
Read moreWhat is the main use of union?
The primary use of a union is allowing access to a common location by different data types , for example hardware input/output access, bitfield and word sharing, or type punning. Unions can also provide low-level polymorphism.
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