CodeYourFuture · BoshraM · Dec 6, 2022 · Dec 8, 2022 · Dec 16, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -10,11 +10,11 @@
 */
 
 // Example 1
-let a;
+let a; // because we didn't declare any value to a
 console.log(a);
 
 
-// Example 2
+// Example 2// because function not returning any values
 function sayHello() {
     let message = "Hello";
 }
@@ -24,13 +24,13 @@ console.log(hello);
 
 
 // Example 3
-function sayHelloToUser(user) {
+function sayHelloToUser(user) { 
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser();// we need to declare user inside that function /we called function but its parameter is not declared
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]);// there is not third index in this array
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,15 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+let i=0 
+let newArray= []
+while (i<n){
+    evenNumber= i*2
+ newArray.push(evenNumber)
+    i++
+}
+  console.log(newArray.join());
 }
-
 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
@@ -16,8 +16,15 @@ const BIRTHDAYS = [
     "November 15th"
 ];
 
+
 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
@@ -5,9 +5,16 @@
 
     Using a do-while loop, write a function which returns the sum of the first n even numbers (starting from 0)
 */
+
+function evenNumbersSum(n){
+    let sum=0;
+    let i=0;
+    do {
+        sum +=(i*2);
+        i++;
+    } while (i<n)
 
-function evenNumbersSum(n) {
-    // TODO
+     return sum
 }
 
 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
@@ -26,6 +26,9 @@ 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
@@ -9,8 +9,15 @@ let tubeStations = [
     "Picadilly Circus",
     "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 letter of str){
+
+    console.log(letter.toUpperCase())
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,7 +12,16 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+   let string=""
+   let report=[]
+
+   for (let city of cities){
+     let temparature=temperatureService(city)
+    string=`The temperature in ${[city]} is ${temparature} degrees`
+    report.push(string)
+
+   }
+    return report
 }
 
 

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 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
@@ -5,33 +5,72 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    let newArray=[];
+
+    for(list of allArticleTitles){
+        if (list.length<=65){
+            newArray.push(list)
+        } 
+    }
+    return newArray
 }
 
+
+
 /*
     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 fewestWordsSoFAr;
+   let titleWithFewestWords;
+     for( let title of allArticleTitles){
+      let numWords=title.split(" ").length
+      if (fewestWordsSoFAr===undefined||numWords<fewestWordsSoFAr){
+        fewestWordsSoFAr=numWords;
+        titleWithFewestWords=title
+      }
+     }
+     return titleWithFewestWords;
 }
 
 /*
     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 doesTitleContainsNumber(title){
+    for (let character of title){
+        if(character>="0" && character<= "9"){
+            return true
+        } 
+    }
+    return false  
+}
+
+
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+    let articleWithNumbers=[]
+    for(let title of allArticleTitles){
+        if (doesTitleContainsNumber(title)){
+            articleWithNumbers.push(title)
+        }
+    }
+      return articleWithNumbers
 }
 
 /*
     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 totalCharacters=0
+   let totalLength=allArticleTitles.length
+   for(title of allArticleTitles){
+    totalCharacters +=title.length
+   }
+   return Math.round(totalCharacters/totalLength)
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -33,8 +33,42 @@ 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
+ let average=[]
+  for (let pricesForStock of closingPricesForAllStocks){
+    sum=0
+    let avergeOfOneStock;
+    for (let price of pricesForStock){
+        sum +=price
+
+    }
+ sum= Math.round(sum*100)/100
+    avergeOfOneStock= sum/pricesForStock.length
+    return average.push(avergeOfOneStock)
+}
+return average
+
+
+}
+
+*/ 
+function getAveragePrices(closingPricesForAllStocks) {
+ let averages=[]
+  for (let pricesForStock of closingPricesForAllStocks){
+
+   averages.push(getAveragePricesForStock(pricesForStock))
+  }
+  return averages
+}
+
+function getAveragePricesForStock(pricesForStock){
+    let total=0
+  for (let price of pricesForStock){
+    total +=price
+  }
+  let averge=total/pricesForStock.length
+  return  Math.round(averge*100)/100;
 }
 
 /*
@@ -48,9 +82,18 @@ 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 pricesForStock of closingPricesForAllStocks){
+        changes.push(getPriceChangesForStock(pricesForStock))
+    }
+
+  return changes
 }
-
+
+ function getPriceChangesForStock(pricesForStock){
+    let priceChange=pricesForStock[pricesForStock.length-1]-pricesForStock[0]
+    return Math.round(priceChange*100)/100
+ }
 /*
     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
@@ -64,9 +107,22 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let description=[]
+    for(let i=0 ;i<closingPricesForAllStocks.length;i++){
+        let highestPrice=getHighPricesForStock(closingPricesForAllStocks[i])
+        description.push(`The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${highestPrice.toFixed(2)}`)
+    }
+    return description;
+}
+function getHighPricesForStock(stockPrice){
+    let heightestPricesSoFar=0;
+    for (price of stockPrice){
+    if (price > heightestPricesSoFar){
+        heightestPricesSoFar=price
+    }
+  }
+  return heightestPricesSoFar
 }
-
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the average price for each stock", () => {

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -9,7 +9,7 @@
 */
 
 function factorial(input) {
-    // TODO
+
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
-Original file line number
+Diff line change
@@ Expand Up / @@ -26,6 +26,9 @@ const AGES = [ @@
     ];
+    for (let i=0; i<WRITERS.length;i++){
+        console.log (`${WRITERS[i]} is ${AGES[i]} years old`)
+    }
     // TODO - Write for loop code here
     /*
@@ Expand Down @@