question about switch, return, break

From: Kingmundi (Kingmundi@AOL.COM)
Date: 12/19/97 

i was going through some of my compiler warning messages,
specifically  some unreachable code messages,
all of it follows the same format as the following example,

switch (mode) {
  case SCMD_DROP:
    obj_to_room(obj, ch->in_room);
    return 0;
    break;
  case SCMD_DONATE:

i was wondering why the switch statements all follow the practice
of following return0  with a break statement?  is it a precaution?


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