Dereference *

• Given that

  int x;
  
  int *pt;
  pt = &x;

when pt appears in an expression, it gives you the value of pt. That is the address of variable x (say 9640).

• When *pt appears in an expression, it gives the value of the variable pt is pointing to. That is, the value of x (if pt has the address of x). This is called dereference.

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