CodeYourFuture · Bahare09 · Dec 4, 2022 · Dec 5, 2022 · Dec 5, 2022 · Dec 5, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -9,12 +9,12 @@
     For each example, can you explain why we are seeing undefined?
 */
 
-// Example 1
+// Example 1: because no value assign to the variable "a"
 let a;
 console.log(a);
 
 
-// Example 2
+// Example 2: because function does not have any return. 
 function sayHello() {
     let message = "Hello";
 }
@@ -23,14 +23,14 @@ let hello = sayHello();
 console.log(hello);
 
 
-// Example 3
+// Example 3: because there is no argument when call the function.
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
 sayHelloToUser();
 
 
-// Example 4
+// Example 4: because arr[3] dose not have value.
 let arr = [1,2,3];
 console.log(arr[3]);
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -7,6 +7,16 @@
 
 function evenNumbers(n) {
     // TODO
+    let i=0;
+    let evenNumber = 0;
+    let arr = [];
+    while(i<n){
+        evenNumber = i*2;        
+        arr[i] = evenNumber;        
+        i++;        
+    }
+    let commaSeperated = arr.join(",");
+    console.log(commaSeperated);
 }
 
 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
@@ -1,3 +1,4 @@
+
 /*
     Loops can be useful when working with arrays.
     In the below example, imagine we've defined an array holding the birthdays of your closest friends.
@@ -18,6 +19,13 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    let i=0;
+    while(!(birthdays[i].includes("July"))){
+
+        i++;
+    }
+    return birthdays[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
@@ -8,6 +8,16 @@
 
 function evenNumbersSum(n) {
     // TODO
+    let i=0;
+    let sumEven=0;
+    do{
+        sumEven+=(i*2)
+        i++;
+    }
+    while ( i<n);
+
+    return (sumEven);
+
 }
 
 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 +6,9 @@
 
 
 // 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 +27,9 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for (let i=0;i<WRITERS.length-1;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 tubeStation of tubeStations){
+    console.log (tubeStation)
+}
 
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for( char of str){
+    console.log (char.toUpperCase())
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,6 +13,12 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    let arr=[];    
+    for (let citi of cities)  {     
+         arr.push(`The temperature in ${citi} is ${temperatureService(citi)} degrees`);
+
+    }
+    return arr;
 }
 
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -11,6 +11,11 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    let value= 0;
+    do{
+        value = generateRandomNumber();
+    }while (value < 50);
+    return value;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -6,6 +6,13 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+    let arr =[];
+    for (let article of allArticleTitles){
+        if (article.length <= 65){
+            arr.push(article)
+        }
+    }
+    return arr;
 }
 
 /*
@@ -15,6 +22,16 @@ function potentialHeadlines(allArticleTitles) {
 */
 function titleWithFewestWords(allArticleTitles) {
     // TODO
+
+    let arr =[];
+    myMin= 0;
+
+    for (let article of allArticleTitles){
+        arr.push (article.split(' ').length);  
+    }
+
+    myMin= Math.min(...arr);
+    return allArticleTitles[arr.indexOf(myMin)];
 }
 
 /*
@@ -24,6 +41,18 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    let arr=[]
+    for (let article of allArticleTitles){
+        for (let char of article){
+            if (char>="0" && char<="9"){
+                arr.push (article);
+                break;
+            }
+
+        }
+    }
+    return arr
+
 }
 
 /*
@@ -32,6 +61,12 @@ function headlinesWithNumbers(allArticleTitles) {
 */
 function averageNumberOfCharacters(allArticleTitles) {
     // TODO
+    let sum=0;
+    for (let article of allArticleTitles){
+        sum+=article.length;
+    }
+    return Math.round(sum/allArticleTitles.length)
+
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -33,8 +33,20 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Solve the smaller problems, and then build those solutions back up to solve the larger problem.
         Functions can help with this!
 */
-function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+ function getAveragePrices(closingPricesForAllStocks) {
+    // TODOfunction
+
+    let averageArr=[];
+    for (let closingPricesForStock of closingPricesForAllStocks){
+        let sum =0;
+        for (let item of closingPricesForStock){
+            sum=sum+item;
+        }
+        averageArr.push(Number((sum/closingPricesForStock.length).toFixed(2)));
+
+    }
+    return averageArr;
+
 }
 
 /*
@@ -48,10 +60,17 @@ 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 arr=[];
+   for (let closingPricesForStock of closingPricesForAllStocks){    
+    arr.push(Number((closingPricesForStock[closingPricesForStock.length-1]-closingPricesForStock[0]).toFixed(2)));
+
+   }
+   return arr;
+
 }
 
-/*
+   /*
     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
         - Takes 2 parameters:
@@ -63,8 +82,15 @@ function getPriceChanges(closingPricesForAllStocks) {
     The stock ticker should be capitalised.
     The price should be shown with exactly 2 decimal places.
 */
+
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
     // TODO
+    let arr=[];
+    for (let i=0;i<closingPricesForAllStocks.length;i++){
+        arr.push (`The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${(Math.max(...closingPricesForAllStocks[i])).toFixed(2)}`)
+    }
+    return arr;
+
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -10,6 +10,13 @@
 
 function factorial(input) {
     // TODO
+    let i=1;
+    let multy=1;
+    while(i<= input){
+        multy*=i;
+        i++;
+    }
+    return multy;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */