diff --git a/04week/loop.js b/04week/loop.js
index e69de29bb..cfa56649d 100644
--- a/04week/loop.js
+++ b/04week/loop.js
@@ -0,0 +1,31 @@
+let arr = [1, 2, 3, 4, 5];
+let arrNew = arr.concat(arr);
+console.log(arrNew);
+
+let x = 1;
+
+do {
+	// Increment variable by 1
+	x++;
+	console.log(x);
+} while (x < 1000);
+
+let person = {
+	firstName: "Jane",
+	lastName: "Doe",
+	birthDate: "Jan 5, 1927",
+	gender: "female"
+};
+
+let value = person.birthDate[person.birthDate.length - 1];
+
+console.log(value);
+
+console.log(typeof person.birthDate[person.birthDate.length - 1]);
+
+let arrayOfPersons = {
+	firstName: "Jane",
+	lastName: "Doe",
+	birthDate: "Jan 5, 1927",
+	gender: "female"
+};