Difference between structure and union

Both structure and union are user-defined data types that contain data of different types. A few of the important differences between structure and union are:

Structure	Union
Each member of the structure has its own memory location.	All the members of the union share the same memory address.
The size of the structure is the sum of the size of each member present.	The size of the union is the size of the largest member present in the union.
All members can be initialized with the values at once and so can be accessed.	Only one member can be initialized and accessed at a time.
Altering the values of the member will not affect the other members of the structure	Altering the values of the member will affect the other member of the structure

Relevant Posts:

• Structure in C
• Union in C
• Function in C
• Structure padding
• Array of structure
• Pointer to structure

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‹ union in c

Typedef in C ›

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Categories: C Language