Outline
Here's one solution for this assignment:
// command-line-flags.ts
const { args } = Deno;
import { parse } from 'https://deno.land/std/flags/mod.ts';
const parsedArgs = parse(args);
const name = parsedArgs.name || 'Friend';
console.log(`Welcome, ${name}`);
Here's the result of running the command with and without a flag:
deno run command-line-flags.ts --name Preston
Welcome, Preston
deno run command-line-flags.ts
Welcome, Friend