Unions

• The storage referenced by a union variable can hold data of different types subject to the restriction that at any one time, the storage holds data of a single type.

• Union numbers {
  
  char letter;
  int number;
  float dec_number;
  double precise_num;
  };
  union numbers num1;
  num1.letter = 'A'; /* num1 stores 'A' */
  num1.number = 5529; /* num1 stores 5529 */
  num1.precise_num = 2.8; /* num1 stores 2.8 */

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