CodeYourFuture · Innapoliakova · Dec 9, 2022 · Dec 27, 2022 · Abdirizak-Mohamed · Jan 5, 2023
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -12,25 +12,35 @@
 // Example 1
 let a;
 console.log(a);
-
+ // undefined - because variable not assigned
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
+// undefined - because function not called
+
 
 let hello = sayHello();
 console.log(hello);
 
+// undefined - because function not declared
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
+
 sayHelloToUser();
 
+// undefined - because we put nothing like an argument 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+
+// undefind - becouse array isn't conclude element with index 3 
+
+
+
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -5,9 +5,18 @@
     The list of numbers should start with 0. n is being passed in as a parameter.
 */
 
+
 function evenNumbers(n) {
-    // TODO
-}
+  let result = [];
+
+    let i = 0;
+    while (i < n) {
+      result.push(i * 2);
+      i++;
+    }
+    console.log(result.join());
+  }
+
 
 evenNumbers(3); // should output 0,2,4
 evenNumbers(0); // should output nothing

diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,7 +17,14 @@ 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
@@ -7,9 +7,19 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+
+  let sum = 0;
+
+  let i = 0;
+  do {
+    sum += (i * 2);
+    i ++; 
+  } while (i < n);
+  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
@@ -6,9 +6,10 @@
 
 
 // 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
@@ -10,6 +10,8 @@
     Using a for loop, output to the console a line about the age of each writer.
 */
 
+
+
 const WRITERS = [
     "Virginia Woolf",
     "Zadie Smith",
@@ -26,6 +28,10 @@ const AGES = [
     49
 ];
 
+for (let i = 0; i < WRITERS.length; i++) {
+  console.log(`${WRITERS[i]} is ${AGES[i]} years old`);
+}
+
 // TODO - Write for loop code here
 
 /*

diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,14 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (let stations of tubeStations) {
+    console.log(stations);
+}
+
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+for (let letters of str) {
+  console.log(letters.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,6 +12,12 @@
 */
 
 function getTemperatureReport(cities) {
+    let report = [];
+    for ( let city of cities) {
+        let temperature = temperatureService(city);
+        report.push(`The temperature in ${city} is ${temperature} degrees`);
+    }
+    return report
     // TODO
 }
 
@@ -32,6 +38,8 @@ 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
@@ -10,7 +10,10 @@ 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
@@ -5,16 +5,34 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    let headlines = [];
+    for (let i = 0; i < allArticleTitles.length; i ++) {
+        if (allArticleTitles[i].length <=65) {
+            headlines.push(allArticleTitles[i]);
+        }
+    }
+    return headlines
 }
 
 /*
     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 fewestWordSoFar;
+    let titleWithFewstWords;
+
+for (let title of allArticleTitles) {
+    let numWords = title.split(' ').length; 
+    if(fewestWordSoFar === undefined || numWords < fewestWordSoFar) {
+        fewestWordSoFar = numWords;
+        titleWithFewestWords = title;
+    }
+}
+return titleWithFewestWords;
 }
 
 /*
@@ -23,15 +41,33 @@ 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 articleWithNumber = [];
+    for (let title of allArticleTitles) {
+        if (doesTitleContainANumber(title)) {
+            articleWithNumber.push(title);
+        }
+    }
+    return articleWithNumber;
 }
 
+function doesTitleContainANumber(title) {
+    for (let charactor of title) {
+        if (charactor >='0' && charactor <= '9') {
+        return true;
+    }
+}
+return false;
+}
 /*
     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 totalCaracters = 0;
+    for (let title of allArticleTitles) {
+        totalCaracters +=title.length;
+    }
+    return Math.round(totalCaracters / allArticleTitles.length) 
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -34,9 +34,24 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+    let averagePriceForEachStock = [];
+for ( let priceForStock of CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS) {
+    averagePriceForEachStock.push(getAveragePricesForStock(pricesForStock));
+}
+    return averagePriceForEachStock
 }
 
+ function getAveragePricesForStock(pricesForStock) {
+    let total = 0;
+    for (let price of pricesForStock) {
+        total += price;
+    }
+    return roundTo2Decimals(total/pricesForStock.length);
+
+    function roundTo2Decimals (num) {
+        return Math.round(num*100) /100 
+    }
+ }
 /*
     We also want to see what the change in price is from the first day to the last day for each stock.
     Implement the below function, which