Join

Joins a channel.

/join <channel> [key]

If channel mode +k is set you will need to specify the correct channel key in order to join a channel. For example:

/join #mysecretchannel helloworld

You can join multiple channels in one command by seperating them with a comma (,)

/join #channel1,#channel2 password,#channel3

Note: Joining channel 0 makes you part all channels. All channels before the 0 are not joined, channels behind 0 are joined after parting all current channels.