Pangram checker: Difference between revisions

=={{header|UNIX Shell}}==

{{works with|Bourne Again SHell 4+}}

<lang bash>function pangram? {

local alphabet=abcdefghijklmnopqrstuvwxyz

local string="$*"

string="${string,,}"

while [[ -n "$string" && -n "$alphabet" ]]; do

local ch="${string%%${string#?}}"

string="${string#?}"

alphabet="${alphabet/$ch}"

done

[[ -z "$alphabet" ]]

}</lang>