CodeYourFuture · rahwafesseha · Jan 13, 2022 · DelroyGayle · Jan 17, 2022 · mahsa2
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -12,7 +12,7 @@
 // Example 1
 let a;
 console.log(a);
-
+//Because we didn't assign a value for a variable a when we first declaring it.
 
 // Example 2
 function sayHello() {
@@ -21,16 +21,19 @@ function sayHello() {
 
 let hello = sayHello();
 console.log(hello);
+//Because the function is not returning anything.
 
 
 // Example 3
 function sayHelloToUser(user) {
-    console.log(`Hello ${user}`);
+   console.log(`Hello ${user}`); 
 }
 
 sayHelloToUser();
+//we didn't pass argument to the function when we are calling it.
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+//Because we don't have index 3.
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,19 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+  // TODO
+  let arr = [];
+  let i = 0;
+  while (i % 2 === 0 && n > 0 && n > arr.length) {
+    arr.push(i);
+    i += 2;
+
+  }
+
+  return arr.toString(); // changes the numbers to strings
 }
 
-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
@@ -18,6 +18,15 @@ const BIRTHDAYS = [
 
 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
@@ -6,10 +6,24 @@
     Using a do-while loop, write a function which returns the sum of the first n even numbers (starting from 0)
 */
 
-function evenNumbersSum(n) {
+function evenNumbersSum(num) {
     // TODO
+    let i = 0;
+    let sum = 0;
+    let number = 0;
+
+    do{ 
+        sum = sum + number;
+        number = number + 2;
+        i = i + 1;
+
+
+ }
+    while(i < num); 
+    return sum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6
 console.log(evenNumbersSum(0)); // should output 0
-console.log(evenNumbersSum(10)); // should output 90
+console.log(evenNumbersSum(10)); // should output 90
+
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
@@ -12,3 +12,8 @@ while(i < 26) {
     i++;
 }
 // The output shouldn't change.
+
+
+for(let i = 0; i < 26; i++) {
+    console.log(String.fromCharCode(97 + i));
+}
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -27,6 +27,10 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for(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
@@ -11,6 +11,13 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
-
+for(tubes of tubeStations) {
+    console.log(tubes);
+}
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+let result = str.toUpperCase();
+for(letter of result) {
+    console.log(letter);
+}
+
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,9 +13,16 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    arrayOfStrings = [];
+    for(let i = 0; i < cities.length; i++) {
+      arrayOfStrings.push("The temperature in " + cities[i] + " is " + temperatureService(cities[i]) + " degrees");
+
+    }
+    return arrayOfStrings;
 }
 
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {
@@ -32,6 +39,7 @@ function temperatureService(city) {
     return temparatureMap.get(city);
 }
 
+
 test("should return a temperature report for the user's cities", () => {
     let usersCities = [
         "London",

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -7,10 +7,17 @@
 function generateRandomNumber() {
     console.log("Generating number...");
     return Math.round(Math.random() * 100);
+
 }
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    let number;
+    do{number = generateRandomNumber() 
+
+    }
+    while(number <= 50)
+    return number;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,33 +5,73 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+  // TODO
+  let newArrayTitle = [];
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    if (allArticleTitles[i].length <= 65) {
+      newArrayTitle.push(allArticleTitles[i]);
+    }
+  }
+  return newArrayTitle;
 }
+
+
 
 /*
     The editor of the FT likes short headlines with only a few words!
     Implement the function below, which returns the title with the fewest words.
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
-}
+  let newString = ''
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    if (newString.length < 1 || newString.split(" ").length > allArticleTitles[i].split(" ").length) {
+      newString = allArticleTitles[i];
+    }
+
+  }
 
+return newString;
+}
 /*
     The editor of the FT has realised that headlines which have numbers in them get more clicks!
     Implement the function below to return a new array containing all the headlines which contain a number.
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+    let newClicks = [];
+
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        for (let letter of allArticleTitles[i])  {
+            if (letter === "0"||
+                letter === "1"||
+                letter === "2"||
+                letter === "3"||
+                letter === "4"||
+                letter === "5"||
+                letter === "6"||
+                letter === "7"||
+                letter === "8"||
+                letter === "9") {
+                newClicks.push(allArticleTitles[i])
+            }
+
+        }
+    }
+    return newClicks;
 }
 
 /*
     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 totalLength = 0;
+
+    for (let i = 0; i < allArticleTitles.length; i++) {
+          totalLength += allArticleTitles[i].length  
+    }
+    return (Math.round(totalLength / allArticleTitles.length))
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -35,6 +35,21 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
 */
 function getAveragePrices(closingPricesForAllStocks) {
     // TODO
+    let newAverage =[]
+    let sum = 0;
+    for (let i = 0; i < CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS.length; i++) {
+      for (let j = 0; j < CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS[i].length; j++) {
+        sum += CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS[i][j];
+      }
+      newAverage.push(
+        (sum / CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS[i].length).toFixed(2) *
+          1
+      );
+
+      sum = 0;
+    }
+   return newAverage;
+
 }
 
 /*
@@ -48,9 +63,13 @@ 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
+  // TODO
+  let newPriceChange = [];
+  for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+    newPriceChange.push((closingPricesForAllStocks[i][4] - closingPricesForAllStocks[i][0]).toFixed(2) * 1);
+  }
+  return newPriceChange;
 }
-
 /*
     As part of a financial report, we want to see what the highest price was for each stock in the last 5 days.
     Implement the below function, which
@@ -65,6 +84,15 @@ function getPriceChanges(closingPricesForAllStocks) {
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
     // TODO
+   highestPrice =[];
+   for(let i=0; i < closingPricesForAllStocks.length; i++) {
+     let highestNum = closingPricesForAllStocks[i].sort(function(a,b){
+         return b-a;} )[0];
+         highestPrice.push(
+           "The highest price of " + stocks[i].toUpperCase() + " " + "in the last 5 days was " + highestNum.toFixed(2));
+
+   }
+   return highestPrice;
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -10,6 +10,12 @@
 
 function factorial(input) {
     // TODO
+
+    for (let i = input - 1; i >= 1; i--) {
+        input= input*i;
+      console.log(input)  
+    }
+    return input;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
@@ -12,6 +12,14 @@
 
 function getHighestRatedInEachGenre(books) {
     // TODO
+    let bookTitles=[];
+    for(let i=0; i<books.length; i++){
+        if(books[i].rating > 4.8){
+         bookTitles.push(books[i].title)   
+        }
+
+    }
+return bookTitles;
 }
 
 

diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
@@ -15,8 +15,18 @@
 
 function generateFibonacciSequence(n) {
     // TODO
+
+    let fib = [0, 1];
+    for(i = 2; i < n; i++) {
+        let y = fib[i-2] + fib[i-1]; 
+        fib.push(y);
+    }
+
+
+  return fib;
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the first 10 numbers in the Fibonacci Sequence", () => {
     expect(generateFibonacciSequence(10)).toEqual(