diff --git a/.DS_Store b/.DS_Store
index d06ffd2ea..93fc62522 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/Week3/homework/creditcardvalidator.js b/Week3/homework/creditcardvalidator.js
new file mode 100644
index 000000000..a0bceec98
--- /dev/null
+++ b/Week3/homework/creditcardvalidator.js
@@ -0,0 +1,107 @@
+'use strict';
+/*main function is getting the info from other functions and returns the errors of the
+invalid card number or returns the statement that says card number is valid.*/
+function main(cardNum) {
+    if (isValid(cardNum) === false) {
+        console.log(`(${cardNum})`)
+        if (checkLength(cardNum) === false) {
+            console.log('Number must be 16 digits!');
+        }
+        if (checkSum(cardNum) === false) {
+            console.log('Sum less than 16!');
+        }
+        if (allEqualCharacters(cardNum) === false) {
+            console.log('All numbers can not be the same!');
+        }
+        if (onlyNumbers(cardNum) === false) {
+            console.log('Invalid characters!');
+        }
+        if (isEndEven(cardNum) === false) {
+            console.log('Odd final number!');
+        }
+        return;
+    }
+
+    console.log(`"${cardNum}" is a valid credit card number.`);
+}
+
+//checking the length of number if its equal to 16
+function checkLength(cardNum) {
+    let numberLength = cardNum.length;
+    if (numberLength == 16) {
+        return true;
+    }
+    return false;
+}
+
+//checking the sum of the digits of the card number if its greater than 16 
+function checkSum(cardNum) {
+    let sum = 0;
+    for (let i = 0; i < cardNum.length; i++) {
+        sum = sum + parseInt(cardNum[i]);
+    }
+    if (sum > 16) {
+        return true;
+    }
+    return false;
+}
+
+/* checking the card number if it has at least 2 different numbers
+.split() method and every() method takes each character of the string into an array 
+then the function checks all the characters if they match with the first one, returns true if all characters same*/
+function allEqualCharacters(cardNum) {
+    let characterCheck = cardNum.split('').every(char => char === cardNum[0]);
+    if (characterCheck == true) {
+        return false;
+    }
+    return true;
+}
+
+// checking if the card number ends with an even number
+function isEndEven(cardNum) {
+    let lastNumber = cardNum[cardNum.length - 1];
+    if (lastNumber % 2 == 0) {
+        return true;
+    }
+    return false;
+}
+
+/* checking if the card number is made of only numbers
+^ does a match for the first character of the string 
+ \d searches for the digits between 0-9*/
+function onlyNumbers(cardNum) {
+    let isNumOnly = /^\d+$/.test(cardNum);
+    if (isNumOnly == true) {
+        return true;
+    }
+    return false;
+}
+
+// checking if the card number is valid according to the given requirements
+function isValid(cardNum) {
+    switch (false) {
+        case checkLength(cardNum):
+            return false;
+        case checkSum(cardNum):
+            return false;
+        case allEqualCharacters(cardNum):
+            return false;
+            break;
+        case onlyNumbers(cardNum):
+            return false;
+            break;
+        case isEndEven(cardNum):
+            return false;
+            break;
+    }
+    return true;
+}
+
+
+main('9999777788880000'); //valid number example
+main('6666666666661666'); //valid number example
+
+main('a92332119c011112'); //Invalid number example
+main('4444444444444444'); //Invalid number example
+main('1111111111111110'); //Invalid number example
+main('6666666666666661'); //Invalid number example
diff --git a/Week3/homework/js-exercises/dog-years.js b/Week3/homework/js-exercises/dog-years.js
new file mode 100644
index 000000000..37c596bc8
--- /dev/null
+++ b/Week3/homework/js-exercises/dog-years.js
@@ -0,0 +1,10 @@
+'use strict';
+
+function calculateDogAge(ageInHumanYear) {
+    let ageInDogYear = 7 * ageInHumanYear;
+    console.log(`Your doggie is ${ageInDogYear} years old in dog years!`);
+}
+
+calculateDogAge(1);
+calculateDogAge(3);
+calculateDogAge(7);
\ No newline at end of file
diff --git a/Week3/homework/js-exercises/fortune-teller.js b/Week3/homework/js-exercises/fortune-teller.js
new file mode 100644
index 000000000..fdbb2b174
--- /dev/null
+++ b/Week3/homework/js-exercises/fortune-teller.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const numChildren = [1, 2, 3, 4, 5, 6, 7];
+const partnerNames = ['Elise', 'Emma', 'Adam', 'John', 'Sophia', 'Amelia', 'Henry'];
+const locations = ['Amsterdam', 'Paris', 'Den Hauge', 'Bangkok', 'Osaka', 'Chicago', 'Istanbul'];
+const jobs = ['Teacher', 'Plumber', 'Software Developer', 'Constraction Worker', 'Doctor', 'Nurse', 'Lawyer'];
+
+//Math.random() produces a random number between 0-1. Math.floor rounds the number
+function tellFortune(numChildren, partnerNames, locations, jobs) {
+    let job_title = jobs[Math.floor(Math.random() * jobs.length)];
+    let location = locations[Math.floor(Math.random() * locations.length)];
+    let wifeName = partnerNames[Math.floor(Math.random() * partnerNames.length)];
+    let number_kids = numChildren[Math.floor(Math.random() * numChildren.length)];
+    console.log(`You will be a ${job_title} in ${location}, and married to ${wifeName} with ${number_kids} kids.`)
+}
+
+tellFortune(numChildren, partnerNames, locations, jobs);
\ No newline at end of file
diff --git a/Week3/homework/js-exercises/randomcompliment.js b/Week3/homework/js-exercises/randomcompliment.js
new file mode 100644
index 000000000..279ab7d26
--- /dev/null
+++ b/Week3/homework/js-exercises/randomcompliment.js
@@ -0,0 +1,17 @@
+'use strict';
+
+let complimentsArr = ['great', 'awesome', 'smart', 'ambitious', 'unique', 'generous', 'thoughtful', 'cheerful', 'supportive', 'open-minded'];
+
+/* to get random compliment ; Math.random() produces a random number between
+0-1. Then multiply it with the length of the array, this will give a random
+index in the array. Then it is passed as an index to array to select a
+compliment from the array, randomly. */
+function giveCompliment(name) {
+    console.log(name.length);
+    let compliment = complimentsArr[Math.floor(Math.random() * complimentsArr.length)];
+    console.log(`You are ${compliment}, ${name}`);
+}
+
+giveCompliment("Mucahit");
+giveCompliment("Mucahit");
+giveCompliment("Mucahit");
\ No newline at end of file
diff --git a/Week3/homework/js-exercises/shopping-cart.js b/Week3/homework/js-exercises/shopping-cart.js
new file mode 100644
index 000000000..6fd2578a9
--- /dev/null
+++ b/Week3/homework/js-exercises/shopping-cart.js
@@ -0,0 +1,15 @@
+'use strict';
+
+let itemsInTheCart = ['bananas', 'milk'];
+
+function addToShoppingCart(newItem) {
+    itemsInTheCart.push(newItem);
+    if (itemsInTheCart.length > 3) {
+        itemsInTheCart.shift();
+    }
+    console.log(`You bought ${itemsInTheCart}!`);
+}
+
+addToShoppingCart('kiwi');
+addToShoppingCart('honey');
+addToShoppingCart('bread');
\ No newline at end of file
diff --git a/Week3/homework/js-exercises/total-cost.js b/Week3/homework/js-exercises/total-cost.js
new file mode 100644
index 000000000..a1f5324ad
--- /dev/null
+++ b/Week3/homework/js-exercises/total-cost.js
@@ -0,0 +1,22 @@
+'use strict';
+
+
+
+
+function calculateTotalPrice(obj) {
+    let totalCost = 0;
+    for (let key in obj) {
+        totalCost = totalCost + obj[key];
+    }
+    console.log(`Total price of all items is ${totalCost.toFixed(2)} .`);
+}
+
+let cartForParty = {
+    chips: 1.20,
+    cookies: 3.99,
+    chocolate: 2.75,
+    coke: 2.50,
+    sunFlowerSeeds: 4.00,
+}
+
+calculateTotalPrice(cartForParty);