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Asked by Anubhav Last Modified
Answer 
A union is a special data type available in C that allows to store different data types in the same memory location. You can define a union with many members, but only one member can contain a value at any given time. Unions provide an efficient way of using the same memory location for multiple-purpose.
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Union can be defined as a user-defined data type which is a collection of different variables of different data types in the same memory location. Union is a user-defined data type, but unlike structures, they share the same memory location
union student {
int rno, m1,m2;
char name[50];
float avg;
} c1;
void main() {
Scanf(“%d”, &c1.rno);
Scanf(“%d”, &c1.m1);
Scanf(“%d”, &c1.m2);
Scanf(“%s”, &c1.name);
c1.avg = (c1.m1 + c1.m2) / 2;
}
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