sh7 a b c
    echo the number of arguments are $#
    echo and they are $@
    echo The last command exit code was $?
    echo Process ID of last BG command $!
    echo Proceess ID of this is $$
    
    produces 
    
    
    the number of arguments are 3
    and they are a b c
    The last command exit code was 0
    Process ID of last BG command
    Proceess ID of this is 10249