CodeYourFuture · Barryeasy90 · Sep 22, 2022 · AltomHussain · Oct 1, 2022 · Barryeasy90
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -10,13 +10,14 @@
 */
 
 // Example 1
-let a;
+let a; // The variable a is declared but not assign to any value. Trying to print it will bring undefined 
 console.log(a);
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello";// The function sayHello() has no return so, console.log(hello) 
+    // will attempt to print empty variable.
 }
 
 let hello = sayHello();
@@ -28,9 +29,9 @@ function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
-
+sayHelloToUser();//The function is called with no parameter, it will attempt to print unrefered variable which will be undefined
+// e.g: sayHelloToUser("Barry");
 
 // Example 4
-let arr = [1,2,3];
-console.log(arr[3]);
+let arr = [1,2,3];// The array has tree elements and 0 to 2 indexes. 
+console.log(arr[3]);// console.log(arr[3]) will attempt to print non existing element (4th element).
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,7 +6,13 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    let i = 0; // TODO
+    let evenNum = 0;
+   while (i < n){
+    console.log(evenNum);
+    i +=1;
+    evenNum +=2;
+   } 
 }
 
 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
@@ -17,7 +17,11 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+    let index = 0;
+    while (birthdays[index] !== "July 11th" ){  // TODO
+        index +=1;
+}
+return birthdays[index];
 }
 
 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
@@ -7,9 +7,25 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let i = 0;
+    let evenNum = 0;
+    let sum = 0;
+    do {
+        evenNum +=2;
+        sum +=evenNum;
+        i += 1 ;  // TODO
+}   while (i < n);
+return sum - evenNum;
+// let i = 0;
+//     let evenNum = 0;
+//     let sum = 0;
+// while (i < n-1){
+//     evenNum +=2;
+//     sum +=evenNum;
+//     i += 1 ;  
+// }
+// return sum; 
 }
-
 console.log(evenNumbersSum(3)); // should output 6
 console.log(evenNumbersSum(0)); // should output 0
 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
@@ -7,8 +7,9 @@
 
 // Change the below code to use a for loop instead of a while loop.
 let i = 0;
-while(i < 26) {
+// while(i < 26) 
+for (i = 0; i < 26; i++){
     console.log(String.fromCharCode(97 + i));
-    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
@@ -1,3 +1,4 @@
+
 /*
     for loops can be useful when we already know exactly how many times we want to loop.
 
@@ -27,7 +28,9 @@ const AGES = [
 ];
 
 // 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 +10,11 @@ let tubeStations = [
     "Oxford Street",
     "Tottenham Court Road"
 ];
-
-
+for (let 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 (let capitaliseStr of str){
+    console.log(capitaliseStr.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,9 +12,17 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
-}
+if (cities === []) {   // TODO
+return [];
+}else {
+for (let i = 0; i < cities.length; i++){
+//    citiesTemperatures[i] = temperatureService(cities[i]);
+    cities[i] = "The temperature in " + cities[i]+" is "+ temperatureService(cities[i])+" degrees";
 
+}
+}
+ return cities;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

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 randomGreaterThan50 = 0;
+    do {// TODO - implement using a do-while loop
+         randomGreaterThan50 = generateRandomNumber();
+} while (randomGreaterThan50 < 50);
+return randomGreaterThan50;
 }
 
 /* ======= 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 publishedTitle = [];
+   for (let titleCharacter of allArticleTitles ) {// TODO
+    if (titleCharacter.length <= 65){
+        publishedTitle.push(titleCharacter);
+    }
+   } 
+   return publishedTitle;
 }
 
 /*
@@ -14,28 +20,54 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
-}
+         let fewestWords = "";
+    for (nElememntInArray of allArticleTitles){
+        let titleLength = 0;
+        for (characterIntitle of nElememntInArray){
+        titleLength +=1;
+        }
+        if (nElememntInArray.length <= titleLength ) {
+         fewestWords = nElememntInArray;
+        } 
+    }
+
+    return fewestWords;
 
+    }
+
 /*
     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 headlineOnNumber = [];
+    for (let i = 0; i < allArticleTitles.length; i++){// TODO
+        for (let loopOnElement of allArticleTitles[i]){
+            if ( loopOnElement === "$"){
+                headlineOnNumber.push(allArticleTitles[i]);
+            }
+        }
+    }    
+    return headlineOnNumber;
 }
 
 /*
     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 i=0;
+    let numberOfCharacters = 0;
+    for (i=0; i<allArticleTitles.length; i++){// TODO
+        for (let characterCount of allArticleTitles[i]){
+            numberOfCharacters +=1;
+         }
+    }
+    return Math.round(numberOfCharacters/i)
 }
 
 
-
 /* ======= List of Articles - DO NOT MODIFY ===== */
 const ARTICLE_TITLES = [
     "Streaming wars drive media groups to spend more than $100bn on new content",