frontend-avond-javascript-oefeningen/while-loop.js

let input = require('readline-sync');

let fuelLevel = 7000;
let astronauts = 1;
let altitude_km = 50;

// while (fuelLevel < 5000 || fuelLevel > 30_000) {
// console.log("Enter starting fuel level:");
// }

// while (astronauts < 1 || astronauts > 7) {
// console.log("Enter the number of astronauts");
// }

while (true) {
	fuelLevel = input.question('Enter starting fuel level:');
	fuelLevel = Number(fuelLevel);
	// anders wordt deze input als string geïnterpreteerd
	if (fuelLevel > 5_000 && fuelLevel < 30_000) {
		break;
	}
}

while (true) {
	astronauts = input.question('Enter number of astronauts:');

	astronauts = Number(astronauts);
	// anders wordt deze input als string geïnterpreteerd

	if (!Number.isInteger(astronauts)) {
		continu;
	}
	// als het nummer geen integer is (bv. hallo, kommagetal,...), wordt de loop verder uitgevoerd

	if (astronauts >= 1 && astronauts <= 7) {
		break;
	}
}

// while (fuelLevel > 100) {
// fuelLevel -= 100;
// altitude_km += 50;
// if (fuelLevel < 100) {
// break;
// }
// }

while (fuelLevel - 100 * astronauts >= 0) {
	altitude_km += 50;
	fuelLevel -= 100 * astronauts;
}

console.log(`Fuel level: ${fuelLevel}`);
console.log(`Altitude: ${altitude_km}`);

if (fuelLevel === 100) {
	console.log("Fuel level is 100 units, impossible to increase altitude !")
}

if (fuelLevel > 5000 && fuelLevel > 30_000 && astronauts > 0 && astronauts < 7 && fuelLevel === 100) {
	console.log(`The shuttle gained an altitude of ${altitude_km} km.`);
}

if (altitude_km >= 2000) {
	console.log("Orbit achieved!");
} else {
	console.log("Failed to reach orbit.");
}