finished while exercise

loops/loop_exercises_while.js

@@ -1,22 +1,39 @@
 let input = require('readline-sync');
-let fuelLevel = input.question("What is the starting fuel?\n");
-let nAstro = input.question('How many astronauts are present?\n');
-let i = 0;
+let fuelLevel = 0;
+let nAstro = 0;
+let altitude = 0;
 
-while (fuelLevel > 0) {
-	if (fuelLevel < 5000 || fuelLevel > 30_000) {
+while (true) {
+	fuelLevel = input.question('What is the starting fuel level?\n');
+	if (fuelLevel > 5000 && fuelLevel < 30_000 && !isNaN(fuelLevel)) {
 		break;
 	}
-	if (nAstro <= 1 || nAstro >= 7) {
+}
+
+while (true) {
+	nAstro = input.question('How many astronauts are present?\n');
+	if (nAstro > 0 &&
+		nAstro <= 7 &&
+		!isNaN(nAstro) &&
+		Number.isInteger(Number(nAstro))) {
 		break;
 	}
+}
+
+while (fuelLevel - (100 * nAstro) >= 0) {
 	fuelLevel -= (100 * nAstro);
-	i += 50;
-	if (fuelLevel <= 100 * nAstro) {
-		break;
-	}
+	altitude += 50;
 }
-console.log(`The shuttle gained an altitude of ${i} km.`);
+
+console.log(`The shuttle reached an altitude of ${altitude} km.`);
+if (altitude >= 2000) {
+	console.log('Orbit reached!');
+} else {
+	console.log('orbit not reached');
+}
+
+
+