Pangram checker

This page is the answer to the task Pangram checker in the Rosetta Code.

Description (from Rosetta Code)

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.

Program

The same program when the flowchart package visualization is selected. Click/tap to enlarge

Example