set -- 1 2

IFS=

a=$* b=${*}
c=${*/} d=${*#} e=${*%} f=${*:1}
printf '<%s>' "$a" "$b" "$c" "$d" "$e" "$f"; echo

unset a b c d e f
: ${a=$*} ${b=${*}} ${c=${*/}}
: ${d=${*#}} ${e=${*%}} ${f=${*:1}}
printf '<%s>' "$a" "$b" "$c" "$d" "$e" "$f" ; echo

unset f g
f=${*,,} g=${*@Q}
printf '<%s>' "$f" "$g" ; echo

unset -v a b c d e f g
unset var

# resetting IFS here

IFS=$' \t\n'

printf '%s\n' "${*:1}"
var=${*:1}; printf '%s\n' "$var"
var="${*:1}"; printf '%s\n' "$var"

unset var
recho ${var-${*}}
recho ${var-${*:1}}
recho "${var-${*:1}}"
recho ${var-"${*:1}"}

unset var
recho ${var=${*}}
printf 'var=%s\n' "$var"
unset var
recho ${var=${*:1}}
printf 'var=%s\n' "$var"

a=${*:1}
recho "$a"

: ${b=${*:1}}
recho "$b"