help/opers/join

   1 JOIN <#channel> [key]
   2
   3 The JOIN command allows you to enter a public chat area known as
   4 a channel. Network wide channels are proceeded by a '#', while
   5 a local server channel is proceeded by an '&'. More than one
   6 channel may be specified, separated with commas (no spaces).
   7
   8 If the channel has a key set, the 2nd argument must be
   9 given to enter. This allows channels to be password protected.
  10
  11 See also: part, list