Added in 1.5
/join [-inx] <#channel> [password]
Joins a channel.
Switches
-i - Join the channel to which you were last invited.
-n - Minimizes the channel to join.
-x - Maximizes the channel to join.
Parameters
<#channel> - Channel to join.
[password] - Channel password if any.
Examples
;Join channel #channel. /join #channel ;Join multiple channels. /join #channel,#channel2 password,#channel3