If you want to use same memory location for two or more members, union is the best for that . Unions are similar to the structure. Union variables are created in same manner as structure variables. The keyword “union” is used to define unions in C language.
Read moreWhat is union and structure in C?
Union. 1. Definition. Structure is the container defined in C to store data variables of different type and also supports for the user defined variables storage . On other hand Union is also similar kind of container in C which can also holds the different type of variables along with the user defined variables.
Read moreWhich is better to use union or struct?
If you want to use same memory location for two or more members, union is the best for that . Unions are similar to the structure. Union variables are created in same manner as structure variables.
Read moreWhat is union and enum in C++?
That is the main difference between structure union and enum in C. … Structure and union are two methods to store multiple variables of different types as a single variable . On the other hand, enum is a data type to declare a set of named constants. All these are user-defined data types.
Read moreWhat is union explain with example?
A union is a user-defined type similar to structs in C except for one key difference . Structures allocate enough space to store all their members, whereas unions can only hold one member value at a time.
Read moreWhat are the uses 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.
Read moreWhat is the difference between a struct and a union?
A union is like a struct in that it generally has several fields, all of which are public by default. Unlike a struct, however, only one of the fields is used at any given time. In other words, it is a structure that allows the same storage space to be used to store values of different data types at different times.
Read more