If 'string' equals another command, displays help for that command if it's available. If 'string' equals '2', displays the second part of the command list. If 'string' equals '1', displays a list of commands that can be used. Note that the parameter of a command is not checked, so it may cause errors when used. boolean: True or false, written as 1 or 0.Quotation marks must be omitted when entering strings in the console for them to be recognized.