— Function: call-command command &optional prefix-arg

This function calls the command command interactively. See the documentation of commandp above for what constitutes a command.

If the prefix-argument is non-nil it defines the value of the current-prefix-arg variable for this command, normally the value of this variable would be taken from the global prefix-arg variable.

There is a corresponding call-command command that prompts for a command to execute.

— Function: apply-command name &rest args

Call the function underlying the command name, passing in args as the arguments. This is useful for calling a command in a non-interactive context.

— Variable: current-prefix-arg

When invoking an interactive command, this is set to the current prefix argument.

— Variable: this-command

The command currently being called, or `nil' if no command is being called.

— Variable: last-command

The command previously called, or `nil' if there is no such command.