isLeader = IsRaidLeader() 

Determines if the player is a raid leader himself.

Returns

isLeader

1 if the player is the raid leader, otherwise nil

Example

 if (IsRaidLeader())
     DEFAULT_CHAT_FRAME:AddMessage ("I am the Raid Leader.");
 elseif not (IsRaidLeader())
     DEFAULT_CHAT_FRAME:AddMessage ("I am not the Raid Leader.");
 end

Notes

Chances are you came to this function looking for a rank check system for your raid, this function will probably not cut it however GetRaidRosterInfo() can handle this