What is a typedef C++?

The typedef in C/C++ is a keyword used to assign alternative names to the existing datatypes . It is mostly used with user-defined datatypes when the naming of the predefined datatypes becomes slightly complicated to use in programs.

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Is typedef C or C++?

typedef is a reserved keyword in the programming languages C and C++ . It is used to create an additional name (alias) for another data type, but does not create a new type, except in the obscure case of a qualified typedef of an array type where the typedef qualifiers are transferred to the array element type.

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When should I use typedef?

The typedef keyword allows the programmer to create new names for types such as int or, more commonly in C++, templated types–it literally stands for “type definition”. Typedefs can be used both to provide more clarity to your code and to make it easier to make changes to the underlying data types that you use .

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What 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.

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