Pangram checker

You are encouraged to solve this task according to the task description, using any language you may know.
A pangram is a sentence that contains all the letters of the English alphabet at least once.

For example:   The quick brown fox jumps over the lazy dog.



Task

Write a function or method to check a sentence to see if it is a   pangram   (or not)   and show its use.



Related tasks

   determine if a string has all the same characters
   determine if a string has all unique characters


-module(pangram).
-export([is_pangram/1]).
 
is_pangram(String) ->
  ordsets:is_subset(lists:seq($a, $z), ordsets:from_list(string:to_lower(String))).