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 () => {
	let name;
	name = await Utils.prompt("What is your name? ");
	let favoriteColor;
	favoriteColor = await Utils.prompt("What is your favorite color? ");
	console.log(Utils.format("Hello, {0:s}!  I like {1:s} too!", name, favoriteColor));
}
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 () => {
	try {
		let favoriteInt;
		let favoriteLong;
		let favoriteDouble;
		let favoriteIntInput;
		favoriteIntInput = await Utils.prompt("What is your favorite small integer? ");
		favoriteInt = Utils.stoi(favoriteIntInput);
		let favoriteLongInput;
		favoriteLongInput = await Utils.prompt("What is your favorite large integer? ");
		favoriteLong = Utils.stoi(favoriteLongInput);
		let favoriteDoubleInput;
		favoriteDoubleInput = await Utils.prompt("What is your favorite floating point? ");
		favoriteDouble = Utils.stod(favoriteDoubleInput);
		const sum = favoriteInt + favoriteLong + favoriteDouble;
		console.log(Utils.format("All together they add up to {0:f}!", sum));
	} catch (ex) {
		if (ex instanceof Utils.NumberFormatError) {
			console.log("Bad input! " + String(ex));
		} else if (ex instanceof Error) {
			console.log("Don't know what went wrong!");
		}
	}
}
main().catch( e => { console.error(e) } );

Questions

• {{Who's on first?}}
• {{Who's on second?}}
• {{Who's on third?}}

Projects

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References

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