CodeYourFuture · MustafaAcar-sys · Sep 21, 2022 · Sep 21, 2022 · Sep 21, 2022 · Sep 21, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -12,25 +12,30 @@
 // Example 1
 let a;
 console.log(a);
-
+// a has not a value that's why undefined.
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
 
+// function has not a return part.
+
 let hello = sayHello();
 console.log(hello);
-
+// There is nothing in the paranthesis of sayHello.
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
 sayHelloToUser();
-
+// function call has no argument
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// There is not any element at the index(3). Array index ends at 2. 
+
+//No questions
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,7 +6,16 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+  const even = [0, 2, 4, 6, 8, 10, 12, 14, 16, 18];
+
+  let string = "";
+  let count = 0;
+  while (count < n) {
+    string += `${even[count]},`;
+    count++;
+  }
+
+  console.log(string);
 }
 
 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
@@ -5,19 +5,25 @@
 */
 
 const BIRTHDAYS = [
-    "January 7th",
-    "February 12th",
-    "April 3rd",
-    "April 5th",
-    "May 3rd",
-    "July 11th",
-    "July 17th",
-    "September 28th",
-    "November 15th"
+  "January 7th",
+  "February 12th",
+  "April 3rd",
+  "April 5th",
+  "May 3rd",
+  "July 11th",
+  "July 17th",
+  "September 28th",
+  "November 15th",
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+  let index = 0;
+  while (index < birthdays.length) {
+    if (birthdays[index].includes("July")) return birthdays[index];
+    index++;
+  }
 }
-
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
+
+
+//Ask about upper-lowercase.
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
@@ -7,7 +7,17 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    	const even = [0, 2, 4, 6, 8, 10, 12, 14, 16, 18];
+
+      let string = "";
+      let counter= 0;
+
+      do {
+        string += `${even[counter]},`;
+        counter++;
+      } while (counter < n);
+
+      return string;
 }
 
 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
@@ -26,8 +26,9 @@ const AGES = [
     49
 ];
 
-// 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
@@ -4,13 +4,19 @@
 
 // TODO Use a for-of loop to output each of the tube stations below.
 let tubeStations = [
-    "Aldgate",
-    "Baker Street",
-    "Picadilly Circus",
-    "Oxford Street",
-    "Tottenham Court Road"
+  "Aldgate",
+  "Baker Street",
+  "Picadilly Circus",
+  "Oxford Street",
+  "Tottenham Court Road",
 ];
 
-
+for (const element of tubeStations) {
+  console.log(element);
+}
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+for (let char of str) {
+  console.log(char.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,52 +12,49 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+  let arr = [];
+  for (let element of cities) {
+    let temp = temperatureService(element);
+    arr.push(`The temperature in ${element} is ${temp} degrees`);
+  }
+  return arr;
 }
 
-
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {
-    let temparatureMap  = new Map();
-
-    temparatureMap.set('London', 10);
-    temparatureMap.set('Paris', 12);
-    temparatureMap.set('Barcelona', 17);
-    temparatureMap.set('Dubai', 27);
-    temparatureMap.set('Mumbai', 29);
-    temparatureMap.set('São Paulo', 23);
-    temparatureMap.set('Lagos', 33);
-    
-    return temparatureMap.get(city);
+  let temparatureMap = new Map();
+
+  temparatureMap.set("London", 10);
+  temparatureMap.set("Paris", 12);
+  temparatureMap.set("Barcelona", 17);
+  temparatureMap.set("Dubai", 27);
+  temparatureMap.set("Mumbai", 29);
+  temparatureMap.set("São Paulo", 23);
+  temparatureMap.set("Lagos", 33);
+
+  return temparatureMap.get(city);
 }
 
 test("should return a temperature report for the user's cities", () => {
-    let usersCities = [
-        "London",
-        "Paris",
-        "São Paulo"
-    ]
-
-    expect(getTemperatureReport(usersCities)).toEqual([
-        "The temperature in London is 10 degrees",
-        "The temperature in Paris is 12 degrees",
-        "The temperature in São Paulo is 23 degrees"
-    ]);
+  let usersCities = ["London", "Paris", "São Paulo"];
+
+  expect(getTemperatureReport(usersCities)).toEqual([
+    "The temperature in London is 10 degrees",
+    "The temperature in Paris is 12 degrees",
+    "The temperature in São Paulo is 23 degrees",
+  ]);
 });
 
 test("should return a temperature report for the user's cities (alternate input)", () => {
-    let usersCities = [
-        "Barcelona",
-        "Dubai"
-    ]
-
-    expect(getTemperatureReport(usersCities)).toEqual([
-        "The temperature in Barcelona is 17 degrees",
-        "The temperature in Dubai is 27 degrees"
-    ]);
+  let usersCities = ["Barcelona", "Dubai"];
+
+  expect(getTemperatureReport(usersCities)).toEqual([
+    "The temperature in Barcelona is 17 degrees",
+    "The temperature in Dubai is 27 degrees",
+  ]);
 });
 
 test("should return an empty array if the user hasn't selected any cities", () => {
-    expect(getTemperatureReport([])).toEqual([]);
-});
+  expect(getTemperatureReport([])).toEqual([]);
+});
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -10,7 +10,12 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+  let call = 0;
+  do {
+    call = generateRandomNumber();
+  } while (call <= 50);
+
+  return call;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -34,7 +34,16 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+  for (let i of closingPricesForAllStocks) {
+    let total = 0;
+    for (let j in i) {
+      total += i[j];
+    }
+    let a = total / i.length;
+    let b = Number(a.toFixed(2));
+    arrayOfAverage.push(b);
+  }
+  return arrayOfAverage;
 }
 
 /*
@@ -48,7 +57,12 @@ 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 priceChanges = [];
+     for (let array of closingPricesForAllStocks) {
+       let output = array[array.length - 1] - array[0];
+       priceChanges.push(Number(output.toFixed(2)));
+     }
+     return priceChanges;
 }
 
 /*
@@ -64,7 +78,15 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let returnMyArray = [];
+    for (let index in closingPricesForAllStocks) {
+      let largestNumber = Math.max(...closingPricesForAllStocks[index]);
+      let outputWithQuote = `The highest price of ${stocks[
+        index
+      ].toUpperCase()} in the last 5 days was ${largestNumber.toFixed(2)}`;
+      returnMyArray.push(outputWithQuote);
+    }
+    return returnMyArray;
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -9,7 +9,10 @@
 */
 
 function factorial(input) {
-    // TODO
+   for (var i = input - 1; i >= 1; i--) {
+     input *= i;
+   }
+   return input;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */