CodeYourFuture · Vanipriyaarun · Aug 15, 2022 · Aug 15, 2022 · Aug 19, 2022 · Sharifa1
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -11,13 +11,13 @@
 
 // Example 1
 let a;
-console.log(a);
+console.log(a);  // value of a is not declared so the output is undefined
 
 
 // Example 2
 function sayHello() {
     let message = "Hello";
-}
+}                               // function returns anything so the output is undefined
 
 let hello = sayHello();
 console.log(hello);
@@ -28,9 +28,9 @@ function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser();   // The Parameter user is not declared so the output is Hello undefined
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]);        // the value of arr[3] is not declared so the output is undefined
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,15 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    let i=0
+    let evenNumbers=[];
+    while(i<n){
+        evenNumbers.push(2*i);   
+        i++
+    }
+    return evenNumbers;
 }
 
-evenNumbers(3); // should output 0,2,4
-evenNumbers(0); // should output nothing
-evenNumbers(10); // should output 0,2,4,6,8,10,12,14,16,18
+console.log(evenNumbers(3)); // should output 0,2,4
+console.log(evenNumbers(0)); // should output nothing
+console.log(evenNumbers(10)) // should output 0,2,4,6,8,10,12,14,16,18
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -15,9 +15,14 @@ const BIRTHDAYS = [
     "September 28th",
     "November 15th"
 ];
-
 function findFirstJulyBDay(birthdays) {
-    // TODO
+    let i=0;
+    while(i<birthdays.length){
+        if(birthdays[i].includes("July")){
+            return birthdays[i];
+        }
+        i++
+    }   
 }
 
 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
@@ -7,7 +7,13 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let i=0
+    let sumOfEven=0;
+    do{
+        sumOfEven=sumOfEven+i*2;
+        i++;
+    }while(i<n)
+    return sumOfEven;
 }
 
 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) {
-    console.log(String.fromCharCode(97 + i));
-    i++;
+for(let i = 0;i < 26; i++){
+    console.log(String.fromCharCode(97 + i)); 
 }
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -26,7 +26,9 @@ const AGES = [
     49
 ];
 
-// TODO - Write for loop code here
+for(let i=0; i<WRITERS.length; i++){
+    console.log(`${WRITERS[i]} is ${AGES[i]} 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
@@ -10,7 +10,13 @@ let tubeStations = [
     "Oxford Street",
     "Tottenham Court Road"
 ];
+for (let char of tubeStations) {
+  console.log(char)
+}
 
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for (let letter of str) {
+  console.log(letter)
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,7 +12,12 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+    let weatherReport=[];
+    for(let city of cities){
+        let temperature=temperatureService(city);
+        weatherReport.push(`The temperature in ${city} is ${temperature} degrees`);
+    }
+    return weatherReport;
 }
 
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -10,7 +10,11 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+    let randomNumber;
+    do{
+        randomNumber=generateRandomNumber();
+    } while (randomNumber<=50) 
+return randomNumber;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,7 +5,13 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    let articleTitle=[];
+    for(let i=0; i<allArticleTitles.length; i++){
+        if(allArticleTitles[i].length<=65){
+            articleTitle.push(allArticleTitles[i])
+        }
+    }
+return articleTitle;
 }
 
 /*
@@ -14,7 +20,13 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+let fewWordsTitle = allArticleTitles.map((title) => {
+    return title.trim().split(" ").length;
+  });
+  let min = Math.min(...fewWordsTitle);
+  let index = fewWordsTitle.indexOf(min);
+  return allArticleTitles[index];
+
 }
 
 /*
@@ -23,15 +35,25 @@ function titleWithFewestWords(allArticleTitles) {
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+    let titleWithNumbers=[];
+    for(let i=0; i<allArticleTitles.length; i++){
+        if (/\d/.test(allArticleTitles[i])) {
+            titleWithNumbers.push(allArticleTitles[i]);
+        }
+    }
+    return titleWithNumbers;
 }
 
 /*
     The Financial Times wants to understand what the average number of characters in an article title is.
     Implement the function below to return this number - rounded to the nearest integer.
 */
 function averageNumberOfCharacters(allArticleTitles) {
-    // TODO
+    let sum=0;
+    for(let i=0; i<allArticleTitles.length; i++){
+        sum+=allArticleTitles[i].length
+    }
+    return Math.round(sum/allArticleTitles.length);
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -34,7 +34,15 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+    let average=[];
+    for(let i=0; i<closingPricesForAllStocks.length; i++){
+    let sum=0;
+        for(let j=0; j<closingPricesForAllStocks[i].length; j++){
+          sum=sum+closingPricesForAllStocks[i][j];  
+        }
+        average.push(parseFloat((sum/closingPricesForAllStocks[i].length).toFixed(2)));
+    }
+    return average;
 }
 
 /*
@@ -48,7 +56,11 @@ function getAveragePrices(closingPricesForAllStocks) {
     The price change value should be rounded to 2 decimal places, and should be a number (not a string)
 */
 function getPriceChanges(closingPricesForAllStocks) {
-    // TODO
+    let priceChange=[];
+    for(let i=0; i<closingPricesForAllStocks.length; i++){
+        priceChange.push(parseFloat((closingPricesForAllStocks[i][4]-closingPricesForAllStocks[i][0]).toFixed(2)));
+    }
+    return priceChange;
 }
 
 /*
@@ -64,7 +76,11 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let highestPrice=[];
+for(let i=0; i<closingPricesForAllStocks.length; i++){
+    highestPrice.push(`The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${(Math.max.apply(Math,closingPricesForAllStocks[i])).toFixed(2)}`)
+}
+return highestPrice;
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -9,7 +9,11 @@
 */
 
 function factorial(input) {
-    // TODO
+    let fact=1;
+    for(let i=0; i<input; i++){
+        fact=fact*(i+1);
+    }
+    return fact;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
@@ -11,7 +11,22 @@
 */
 
 function getHighestRatedInEachGenre(books) {
-    // TODO
+     let listOfGenre = ["non-fiction", "children", "cooking"];
+    let bookTitles = [];
+    for (const genre of listOfGenre) {
+        let maxRating = 0;
+        let index = 0;
+        for (let i = 0; i < books.length; i++) {
+            if (books[i].genre === genre) {
+                if (books[i].rating > maxRating) {
+                    maxRating = books[i].rating;
+                    index = i;
+                }
+            }
+        }
+        bookTitles.push(books[index].title);
+    }
+    return bookTitles;
 }
 
 

diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
@@ -14,9 +14,15 @@
 */
 
 function generateFibonacciSequence(n) {
-    // TODO
+    let fibonacciSequence=[0,1];
+    for(let i = 2; i < n; i++) {
+      fibonacciSequence.push(fibonacciSequence[i-1] + fibonacciSequence[i-2]);
+    }
+    return fibonacciSequence;
 }
 
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the first 10 numbers in the Fibonacci Sequence", () => {
     expect(generateFibonacciSequence(10)).toEqual(