commandloop [prompt] [prompt2] Create an interactive command loop for the current TCL interpreter. This command receives commands from stdin and executes them. It is useful TCL scripts that do not normally converse interactively with a user through a Tcl command interpreter, but which sometimes want to enter this mode. Prompt is a Tcl command string that is evaluated to determine the text of the prompt string. Prompt2 is a command string that is evaluated to determine the ``downlevel prompt'', which is the prompt which is issued for continuation input. When the command terminates, the variables for the prompt hooks will be set to their old value. If these arguments are not specified, the prompt hooks use their current value. Prompt hooks are TCL code that return as their result the prompt to output. The result of the last command executed in the command string (which may be a return) will be used as the prompt.