Command examples

# This line does nothing. It is a comment. Useful in debugger command files.
     # This line also does nothing. 
s    # by default, this is an alias for the "step" command
!s   # shows the value of variable "s".
!!s  # Evaluates "!s" (or "not s"). The first ! is indicates evaluate.
 !s  # Same as above, since there is a space in column one.

info program;; list # Runs two commands "info program" and "list"
pr  "hi ;;-)"  # Syntax error since ;; splits the line and " is not closed.
!puts "hi ;;-)" # One way to do the above.

See also "macro" "alias", "irb", "set auto eval", "set auto irb", "set
abbrev", "info macro", and "show" variants of the above "set"
commands.