Problem Statement

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.

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

Let's start with the solution:

chars: map 97..122 => [to :string to :char &]
pangram?: function [sentence][
    every? chars 'ch ->
        in? ch sentence
]

print pangram? "this is a sentence"
print pangram? "The quick brown fox jumps over the lazy dog."