CodeYourFuture · azadehroshan · Sep 20, 2022 · Sep 21, 2022 · Sep 21, 2022 · Sep 28, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -11,26 +11,27 @@
 
 // Example 1
 let a;
-console.log(a);
-
+console.log 
+// Answer 1:Becuase no value was given to console.log
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
-
 let hello = sayHello();
 console.log(hello);
-
+// Answer: for the reason the functin sayHello does not return any value.
+//  and when call it , we recieve undifined.
 
 // Example 3
 function sayHelloToUser(user) {
-    console.log(`Hello ${user}`);
+   console.log(`Hello ${user}`); 
 }
-
 sayHelloToUser();
+//Answer: becuase the first argumant does not assign a value.( in line 30)
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+//Answer: there is no index 3 in the array (in line 35)
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,25 @@
 */
 
 function evenNumbers(n) {
-    // TODO
-}
+    let output  =''; // '' === false
+    let counter = 0;
+
+    while( counter < n ){ 
+        if ( counter == 0 ){
+           output = "0"
+        }else{ ''
+           output = `${output},${(counter * 2)}` //output + "," + (counter * 2)
+        } 
+        counter++;
+    }
 
+    if( output ){ 
+      console.log( output );
+    }else{
+      console.log("should output nothing");
+    } 
+}
+
 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
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -14,10 +14,16 @@ const BIRTHDAYS = [
     "July 17th",
     "September 28th",
     "November 15th"
-];
+]; 
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+  let counter = 0;
+  while ( counter < birthdays.length ) {  
+    if( birthdays[counter].includes("July") ){ 
+        return birthdays[counter];
+    }
+    counter++;
+  }  
 }
 
-console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
+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 +7,14 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let sum = 0; 
+    let counter = 0;
+    do { 
+        sum += counter * 2; 
+        counter++;
+    } while ( counter < n ); 
+    return sum; 
 }
-
-console.log(evenNumbersSum(3)); // should output 6
+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
@@ -6,9 +6,9 @@
 
 
 // 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
@@ -27,13 +27,11 @@ 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:
 
-Virginia Woolf is 59 years old
-Zadie Smith is 40 years old
-Jane Austen is 41 years old
-Bell Hooks is 63 years old
 Yukiko Motoya is 49 years old
 */
diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,15 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
-
+for(let words of tubeStations) {
+    console.log(words)
+}
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+let capitalise = "";
+for (let letter of str) {
+    capitalise += letter.toUpperCase();
+    console.log(letter.toUpperCase());
+}
+console.log("_____________________");
+console.log(capitalise);
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -11,8 +11,15 @@
         - Hint: you can call the temperatureService function from your function
 */
 
-function getTemperatureReport(cities) {
-    // TODO
+function getTemperatureReport( cities ) {
+    let result = [];
+    for( let city of cities ){
+        let temperature = temperatureService(city);
+        if ( temperature ){
+            result.push( `The temperature in ${city} is ${temperature} degrees`);
+        }
+    }
+    return result;
 }
 
 

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 random;
+    do{
+        random = generateRandomNumber()
+    }while( random < 50 );
+    return random;
 }
 
 /* ======= 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 articles = [];
+    for (let item of allArticleTitles ){
+        if (item.length <= 65 ){
+            articles.push(item);
+        }
+    }
+    return articles;
 }
 
 /*
@@ -14,7 +20,16 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+    let fewestCount;
+    let fewestSentence; 
+    for(let title of allArticleTitles) { 
+        let curentCount = title.split(' ').length; 
+        if( fewestCount === undefined || curentCount < fewestCount) {
+            fewestCount = curentCount;
+            fewestSentence = title;
+        }
+    } 
+    return fewestSentence; 
 }
 
 /*
@@ -23,15 +38,27 @@ 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 article = [];
+    for( let item of allArticleTitles ){
+        for( let string of item ){
+            if ( string >= '0' && string <= '9' ){
+                article.push( item );
+            }
+        }
+    }
+    return article;
 }
 
 /*
     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 total = 0; 
+    for(let title of allArticleTitles) {
+       total += title.length;
+    }
+    return Math.round(total / 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 avg = [];
+    for(let item of closingPricesForAllStocks ){
+        let sum = 0;
+        for(let index of item ){
+            sum += index;
+        }
+        avg.push( Math.round( sum / item.length  * 100 ) / 100 );
+    }
+    return avg;
 }
 
 /*
@@ -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 changes = [];
+    for( let item of closingPricesForAllStocks ){
+       changes.push( Math.round( ( item[item.length - 1] - item[0]  ) * 100 ) / 100 );
+    }
+    return changes;
 }
 
 /*
@@ -64,7 +76,16 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let highest = [];
+
+    for( let index in stocks ){
+        let item = closingPricesForAllStocks[index];
+        item.sort(function(a , b){
+            return b - a;
+        });
+        highest.push(`The highest price of ${stocks[index].toUpperCase()} in the last 5 days was ${item[0].toFixed(2)}`);
+    }
+    return highest;
 }