Console Input

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ConsoleInput1.js

#!/usr/bin/env node;
/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

const Utils = require('./Utils');

const main = async () => {
	const NAME = await Utils.prompt("What is your name? ");
	const FAVORITE_COLOR = await Utils.prompt("What is your favorite color? ");
	console.log(Utils.format("Hello, {0:s}!  I like {1:s} too!", NAME, FAVORITE_COLOR));
}
main().catch( e => { console.error(e) } );

ConsoleInput2.js

#!/usr/bin/env node;
/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

const Utils = require('./Utils');

const main = async () => {
	let favoriteInt = 0;
	let favoriteLong = 0;
	let favoriteDouble = 0.0;
	try {
		const FAVORITE_INT_INPUT = await Utils.prompt("What is your favorite small integer? ");
		favoriteInt = Utils.stoi(FAVORITE_INT_INPUT);
		const FAVORITE_LONG_INPUT = await Utils.prompt("What is your favorite large integer? ");
		favoriteLong = Utils.stoi(FAVORITE_LONG_INPUT);
		const FAVORITE_DOUBLE_INPUT = await Utils.prompt("What is your favorite floating point? ");
		favoriteDouble = Utils.stod(FAVORITE_DOUBLE_INPUT);
	} catch (ex) {
		if (ex instanceof Utils.NumberFormatError) {
			console.log(["Bad input! ", String(ex)].join(''));
		} else if (ex instanceof Error) {
			console.log("Don't know what went wrong!");
		}
	}
	const SUM = favoriteInt + favoriteLong + favoriteDouble;
	console.log(Utils.format("All together they add up to {0:f}!", SUM));
}
main().catch( e => { console.error(e) } );

Questions

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References

• [[JavaScript Language Reference]], Mozilla Developer Network
• [[Mozilla Developer Network]]
• Download [[node.js]]
• [[w3schools.com]]