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C Union

Like Structures, union is a user defined data type.Used For holding different type of elements.In Union all members share the same memory location. Use same memory for two ore more members union is useful.

union union_name   
    data_type 1;  
    data_type 2;  
    data_type N;  
union abc
   int x, y;
void main()
    union abc a;
    a.x = 2; 
    printf ("\n x = %d, y = %d\n\n",a.x, a.y);
    a.y = 10;
    printf ("\n x = %d, y = %d\n\n",a.x, a.y);

x = 2, y = 2
x = 10, y = 10

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