CodeYourFuture · Abdulmajidram · Dec 5, 2022 · Dec 12, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -9,10 +9,10 @@
     For each example, can you explain why we are seeing undefined?
 */
 
-// Example 1
+// Example 1 
 let a;
 console.log(a);
-
+// Answer: Its because there is no value for a.
 
 // Example 2
 function sayHello() {
@@ -21,16 +21,17 @@ function sayHello() {
 
 let hello = sayHello();
 console.log(hello);
-
+// Answer: We didn't call the variable message so it won't output it.
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
 sayHelloToUser();
-
+// Answer:Because user is undefined 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// Answer: We only have 0,1,2 index and there is no value for index 3.
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -7,6 +7,19 @@
 
 function evenNumbers(n) {
     // TODO
+
+    let numbers = [];
+
+    let i = 0;
+
+    while (i < n) {
+
+        numbers.push(i * 2);
+
+        i++;
+    }
+
+    console.log(numbers.join(','));
 }
 
 evenNumbers(3); // should output 0,2,4

diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -18,6 +18,24 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+        let i = 0;
+
+
+    while (i < birthdays.length) {
+
+        let birthday = birthdays[i];
+
+
+        if (birthday.includes('July')) {
+
+            return birthday;
+        }
+
+        i++;
+    }
+
+    return null;
+
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
@@ -8,6 +8,15 @@
 
 function evenNumbersSum(n) {
     // TODO
+        let sum = 0;
+
+    for (let i = 0; i < n; i++) {
+
+        sum += i * 2;
+    }
+
+    return sum;
+
 }
 
 console.log(evenNumbersSum(3)); // should output 6

diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,7 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
+for (let i = 0; i < 26; i++) {
     console.log(String.fromCharCode(97 + i));
-    i++;
 }
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -27,6 +27,13 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for (let i = 0; i < WRITERS.length; i++) {
+
+    let writer = WRITERS[i];
+    let age = AGES[i];
+
+    console.log(`${writer} is ${age} years old`);
+}
 
 /*
 The output should look something like this:

diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,17 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (const station of tubeStations) {
+
+    console.log(station);
+}
+
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+for (const ch of str) {
+    console.log(ch.toUpperCase());
+}
+
+
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,6 +13,19 @@
 
 function getTemperatureReport(cities) {
     // TODO
+
+     let reports = [];
+
+    for (const city of cities) {
+
+        let temperature = temperatureService(city);
+
+        let report = `The temperature in ${city} is ${temperature} degrees`;
+
+        reports.push(report);
+    }
+
+    return reports;
 }
 
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -11,6 +11,13 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+        let num = generateRandomNumber();
+    do {
+        num = generateRandomNumber();
+    } while (num <= 50);
+
+    return num;
+
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -35,6 +35,19 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
 */
 function getAveragePrices(closingPricesForAllStocks) {
     // TODO
+    let averagePrices = [];
+    for (let stockPrices of closingPricesForAllStocks) {
+    let sum = 0;
+
+    for (let price of stockPrices) {
+        sum += price;
+    }
+
+    averagePrices.push(Math.round((sum / stockPrices.length) * 100) / 100);
+}
+
+return averagePrices;
+
 }
 
 /*
@@ -49,6 +62,14 @@ function getAveragePrices(closingPricesForAllStocks) {
 */
 function getPriceChanges(closingPricesForAllStocks) {
     // TODO
+    let priceChanges = [];
+
+    for (let stockPrices of closingPricesForAllStocks) {
+    priceChanges.push(Math.round((stockPrices[stockPrices.length - 1] - stockPrices[0]) * 100) / 100);
+}
+
+return priceChanges;
+
 }
 
 /*
@@ -65,6 +86,17 @@ function getPriceChanges(closingPricesForAllStocks) {
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
     // TODO
+    let highestPrices = [];
+for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+    let stockPrices = closingPricesForAllStocks[i];
+    let maxPrice = Math.max(...stockPrices);
+
+    highestPrices.push(`The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${maxPrice}`);
+}
+
+return highestPrices;
+
+
 }