Also note that there are some special variables which are also introduced by "$":
$$ = process number of the currently running process
$* = all the arguments passed to a process (or subfunction of a script)
$@ = same as above*)
$# = number of all the arguments passed to a process (or subfunction of a script)
$! = process number of the background process invoked by the current process
$? = the return code of the last process executed
$1 ($2, $3, ...) = the first (second, third, ...) positional parameter passed to that process
I hope this helps.
bakunin
____________
*) "$*" and "$@" are basically the same, except when quoted. "$*" gives all arguments surrounded by spaces, "$@" gives all arguments surrounded by quotes. For instance, you call a script this way:
Inside the script you use "$*" and you get a single string: "one arg two arg three arg", whereas when you use "$@" you get three strings: "one arg" "two arg" "three arg".
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on ksh
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