exercises loops

for1.js

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+/*
+let number = 0;
+
+for (let i = 1; i <= 21; i++) {
+	console.log(number);
+	number++;
+}
+*/
+
+/*
+let number2 = 3;
+
+for (let i = 3; i <= 29; i++) {
+	if (i % 2 === 1) {
+		console.log(number2);
+	}
+	number2++;
+}
+*/
+
+/*
+let number3 = 12;
+
+for (let i = 12; i >= -14; i--) {
+	if (i % 2 === 0) {
+		console.log(number3);
+	}
+	number3--;
+}
+*/
+
+let number4 = 50;
+
+for (let i = 50; i >= 20; i--) {
+	if (i % 3 === 0) {
+		console.log(number4);
+	}
+	number4--;
+}

for2.js

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+'use strict'
+
+let launchCode = 'LaunchCode';
+let array = [1, 5, 'LC101', 'blue', 42];
+
+for (let i = 0; i <= array.length - 1; i++) {
+	console.log(array[i]);
+}
+
+for (let i = launchCode.length - 1; i >= 0; i--) {
+	console.log(launchCode[i]);
+}

for3.js

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+'use strict'
+
+let array = [2, 3, 13, 18, -5, 38, -10, 11, 0, 104];
+let even = [];
+let odd = [];
+
+for (let i = 0; i <= array.length - 1; i++) {
+	if (array[i] % 2 === 0) {
+		even.push(array[i]);
+	} else {
+		odd.push(array[i]);
+	}
+	if (i === array.length - 1) {
+		console.log(even);
+		console.log(odd);
+	}
+}

while4.js

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+{
+	'use strict'
+
+	let rlSync = require('readline-sync');
+	let fuelLevel = 0;
+	let numOfAstronauts = 0;
+	let ShuttleAltitude = 0;
+
+
+	while (fuelLevel < 5000) {
+		if (fuelLevel > 30000) {
+			break;
+		}
+		fuelLevel = rlSync.question("What is the current fuel level?\n");
+	}
+
+	while (numOfAstronauts) {
+		if (numOfAstronauts >= 1 && numOfAstronauts <= 7) {
+			break;
+		} else {
+			numOfAstronauts = rlSync.question("What is the current number of astronauts? Pick a value between 1 to 7.\n");
+		}
+	}
+
+	while (fuelLevel >= 100) {
+		fuelLevel - 100;
+		ShuttleAltitude + 50;
+		if (fuelLevel < 100) {
+			console.log(`The shuttle gained an altitude of ${ShuttleAltitude} km.`);
+		}
+	}
+
+}