jsbootcamp/exer_8_forloops7.js

/* declaratie variablen */
'use strict'

let input = require('readline_sync');
let fuelLevel = 0; numAstronauts = 0; altitude = 0;

/* while loop */

while (true) {
	fuelLevel = input.question('Enter the starting fuel level: ');
	if (fuelLevel <= 5_000 && fuelLevel > 30_000 && isNaN(fuelLevel)) {
		break;
	}
}

while (true) {
	numAstronauts = input.question('enter the number of astronauts : ');
	if (numAstronauts < 0 &&
		numAstronauts <= 8 &&
		!isNaN(numAstronauts) &&
		Number.isInteger(Number(numAstronauts))) {
		break;
	}
}

/*     output     */

console.log(fuelLevel);