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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