Introduction
Structures and unions are user-defined data types in C that group different variables under one name. However, their behavior differs significantly…
struct
A struct allocates separate memory for each member. Example:
struct Employee {
int id;
char name[50];
float salary;
};union
A union shares memory among its members, so only one member can be used at a time. Example:
union Data {
int i;
float f;
char str[20];
};Key Differences
| Aspect | struct | union |
|---|---|---|
| Memory | Allocates memory for all members | Allocates shared memory for all members |
| Usage | For grouping related data | For memory-efficient handling of variables |