diff --git a/app.js b/app.js
new file mode 100644
index 000000000..4f72bdb2f
--- /dev/null
+++ b/app.js
@@ -0,0 +1,141 @@
+//1.
+let englishGreeting = "Hello, World!"
+console.log(englishGreeting);
+let kurdishGreeting = "Silav, Cihan!"
+console.log(kurdishGreeting);
+let dutchGreeting = "Hoi, Wereld!"
+console.log(dutchGreeting);
+
+//2.
+let me = "I'm awesome!"
+console.log(me);
+
+//3.1
+let x;
+
+//3.2
+console.log("I think the value of x will be: undefined");
+
+//3.3
+console.log(x);
+
+//3.4
+let x = 6;
+
+//3.5
+console.log("the value of x is: 6");
+
+//3.6
+console.log(x);
+
+//4.1
+let y ="Sivan";
+
+//4.2
+console.log("I think the value of y is a name");
+
+//4.3
+console.log(y);
+
+//4.4
+const y = "Hassam";
+
+//4.5
+console.log("There will be an error because now I have the same variable with different values.");
+
+//4.6
+console.log(y);
+
+//5.
+const z = 7.25;
+
+//5.1
+console.log(z);
+
+//5.2
+const a = z;
+
+//5.3
+console.log(a);
+
+//5.4
+var round =Math.round(7.25);
+
+//5.6
+console.log(round)
+
+//6.1
+let arrays;
+
+//6.2
+console.log("I think the value will be undefined");
+
+//6.3
+console.log(arrays);
+
+//6.4
+let myFavoriteAnimals = ['cat', 'dog', 'sheep'];
+
+//6.5
+console.log(myFavoriteAnimals);
+
+//6.6
+const animals = myFavoriteAnimals.push('baby pig');
+
+//6.7
+console.log(animals);
+
+//7.1
+let myString = "this is a test";
+
+//7.2
+console.log(myString);
+
+//7.3
+console.log(myString.length);
+
+//8.1
+let num = 11;
+let address = "Huygenhoekring";
+let supermarkets = ["Lidl", "Dekka", "Jumbo"];
+let booleans = true, false, true;
+
+//8.2
+console.log(num);
+console.log(address);
+console.log(supermarkets);
+console.log(booleans);
+
+//8.3
+console.log("I think the type of num is number, type of address is string, type of supermarkets is array and type of booleans is boolean.");
+
+//8.4
+console.log(typeof num);
+console.log(typeof supermarkets);
+console.log(typeof booleans);
+console.log(typeof address);
+
+//8.5
+if (num != address) {
+    console.log("num is a number and address is a string");
+}
+
+//9.1
+let s = 7;
+let v = 3;
+let h = s % 3;
+console.log(s % h);
+console.log(s % v);
+console.log(v % h);
+
+//10.1
+const mix = [5, "Shvan"];
+console.log(mix);
+
+//10.2
+var maxNumber = Math.pow(6/0);
+
+//10.2
+if (maxNumber === Infinity){
+console.log(0 / maxNumber);
+}
diff --git a/week3.js b/week3.js
new file mode 100644
index 000000000..c9ba185a6
--- /dev/null
+++ b/week3.js
@@ -0,0 +1,131 @@
+//String
+let myString = "Hello,this,is,a,difficult-,to-,read,sentence";
+console.log(myString);
+console.log(myString.length);
+myString = myString.replace(/,/g, " ");
+console.log(myString);
+
+//Arrays
+let favoriteAnimals = ["blowfish", "capricorn", "giraffe"];
+console.log(favoriteAnimals);
+
+let favoriteAnimalsOfMauro = ["blowfish", "capricorn", "giraffe", "turtle"];
+console.log(favoriteAnimalsOfMauro);
+
+let favoriteAnimalsOfJim = ["blowfish", "meerkat", "capricorn", "giraffe", "turtle"];
+console.log("The favorite animal of Jim is added to the array.");
+console.log(favoriteAnimalsOfJim);
+console.log("The array has a length of:", favoriteAnimalsOfJim.length);
+
+let favoriteAnimalsOfJason = ["blowfish", "meerkat", "capricorn", "turtle"];
+console.log(favoriteAnimalsOfJason);
+console.log(favoriteAnimalsOfJason.length);
+console.log(favoriteAnimalsOfJason[1], "The item you are looking for is at index:2");
+
+//JavaScript
+function sum(a, b, c) {
+    return a + b + c;
+}
+console.log(sum(5, 3, 2));
+//2.
+function colorCar(color){
+    return "A" + color + "car";
+ }
+ console.log(colorCar("red"));
+//3.
+let country = {Land: "The Netherlands", Population:"17 million", Capital:"Amsterdam"};
+console.log(country);
+console.log(country.Land);
+console.log(country.Population);
+//4.
+function vehicleType(color, code){
+    if (code === 1){
+    console.log("A" + color + "car");
+} else if (code === 2){
+console.log("A" + color + "motorbike");}
+}
+vehicleType("blue", 2);
+//5.
+3===3 ? console.log("Yes") : console.log("No");
+//6
+function vehicle(color, code, age){
+    if (code === 1 || age > 5){
+    console.log("A" + "" + color + "" + "used car");
+} else if (code === 2 || age < 5){
+    console.log("A" + "" + color + "" + "new car");
+}
+    }
+vehicle("blue", 1, 5);
+//7.
+const vehicleList = [
+     "motorbike",
+     "caravan",
+     "bike",
+     "bicycle",
+     "car"
+];
+console.log(vehicleList.length);
+console.log(vehicleList[2]);
+
+//9
+function newVehicle(color){
+    if (vehicleList[2] = 3){
+        console.log("A" + "" + color + "" + "new" + "" + "bike");
+    } else (vehicleList[2] > 3);{
+        console.log("A" + "" + color + "" + "old" + "" + "bike")
+    }
+}
+newVehicle("green", 3, 1);
+
+//10
+const advertisement = vehicleList;
+console.log(advertisement);
+for (let index = 0; index < advertisement; index++) {
+    console.log(advertisement[index]);
+}
+if (advertisement.length = 5) {
+    console.log("Amazing Joe's Garage >>> Here we service cars, motorbikes, caravans and bikes.");
+}else {
+    console.log("Amazing Joe's Garage >>> Here we service bulldozers, lorries and trucks.");
+}
+//11
+const newVehicleList = advertisement + "" + "scooter";
+console.log(newVehicleList);
+//12.
+let object;
+//13+14
+let teachers = {Philip: "HTML/CSS", Rob: "HTML/CSS", Hardit: "CLI", Bonan: "CLI", Ogor: "CLI", Unmesh: "GIT", Marciano: "JS", Sander: "JS"};
+
+//15
+let x = [1, 2, 3];
+let y = [1, 2, 3];
+let z = y;
+console.log(x == y);
+console.log(x === y);
+
+console.log(x == z);
+console.log(x === z);
+
+console.log(y == z);
+console.log(y === z);
+
+//16.
+let o1 = { foo: "bar" };
+let o2 = { foo: "bar" };
+let o3 = o2;
+console.log(o1);
+console.log(o2);
+console.log(o3);
+//Do you mean to make new ones?
+let o1New = {quur: "quuur"};
+let o2New = {quur: "quuur"};
+let o3New = o2New;
+console.log(o1New);
+
+//17.
+let bar = 42;
+typeof typeof bar;
+console.log(typeof bar); //->> number.
+console.log(typeof typeof bar); //->> string.
+
+//the end.
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