Completed solution for issue 1

1-js-basics/1-data-types/SOLUTION.md

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+# Data Types in a Shopping Cart
+
+## Introduction
+A shopping cart contains different data types to effectively manage UI, products, user and network. Here are some of the data types that may be useful for developing a shopping cart:
+
+## Data Types
+
+### 1. **String**
+**Purpose:** To store data like user name, product name, locations etc...
+**Example:**
+```javascript
+let userName = "Gokul";
+let productName = "Pavillion HP Gaming Laptop"
+```
+
+### 2. **Array**
+**Purpose:** To store different product objects in a cart, listing all products in the document
+**Example:**
+```javascript
+let productList = [];
+productList.push(myProduct);
+```
+
+### 3. **Boolean**
+**Purpose:** To store values that represent true or false like the availability of product, user is logged in, free shipping etc...
+**Example:**
+```javascript
+bool isAvailable = false;
+if(!isAvailable)
+{
+	...
+}
+```
+
+### 4. **Date**
+**Purpose:** Date type can be used to display the delivery date, packaging date etc...
+**Example:**
+```javascript
+const delivery = new Date("2025-03-10");
+```
+
+### 5. **Object**
+**Purpose:** Object can be an instance of a Product class, which may contain information about count, price etc... An array of product objects are added to the cart.
+**Example:**
+```javascript
+let product = new Product("Kurti", 299.9);
+```
+
+## Challenge
+
+```javascript
+NaN == NaN // false
+Number.isNaN(NaN) // true
+
+## Assignment
+```
+<input type="button" value="Go Back From Whence You Came!" onclick="history.back(-1)" />
+```

1-js-basics/2-functions-methods/SOLUTION.md

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+## Challenge
+Functions and methods are very similar but they differ in OOP. Functions defined in a class is known as methods. Functions are independent of any class.
+
+
+## Assignment
+```javascript
+function say() {
+	console.log("Hello world!");
+}
+
+say();
+```
+
+```javascript
+function greet(name = "User") {
+	console.log("Hello " + name + "!");
+}
+
+greet("Nandu");
+```
+
+```javascript
+
+function isOdd(n) {
+	return n & 1;
+}
+
+if (isOdd(5)) {
+	console.log("5 is an odd number!");
+} else {
+	console.log("5 is an even number!");
+}
+```
+
+```javascript
+function sum(...numbers) {
+    return numbers.reduce((acc, num) => acc + num, 0);
+}
+console.log(sum(5, 6, 2, 3))
+```

1-js-basics/3-making-decisions/SOLUTION.MD

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+## Challenge
+
+```javascript
+x = 10
+if (x%5 == 0) {
+	console.log("Divisible by 5");
+} else {
+	console.log("Not divisible by 5");
+}
+```
+
+```javascript
+x = 8
+console.log(x%5 == 0 ? "Divisible by 5" : "Not divisible by 5");
+```
+
+I prefer using if else statements for understandability and I use ternary operator when the program code does not look good.
+
+## Assignment
+
+```javascript
+let allStudents = [
+  'A',
+  'B-',
+  1,
+  4,
+  5,
+  2
+]
+
+let studentsWhoPass = [];
+
+allStudents.forEach(v => {
+	if (typeof(v) == 'string') {
+		if (v != 'C-') {
+			studentsWhoPass.push(v)
+		}
+	} else {
+		if (v>3) {
+			studentsWhoPass.push(v)
+		}
+	}
+});
+```

1-js-basics/4-arrays-loops/SOLUTION.MD

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+## Challenge ##
+
+```javascript
+
+let numbers = [1, 2, 3, 4]
+
+// Normal for loop
+
+for (let i = 0; i < numbers.length; i++) {
+	console.log(numbers[i] * 2);
+}
+
+// for each
+
+numbers.forEach(num => console.log(num*2));
+
+// map
+
+console.log(numbers.map(num => num*2));
+
+// for of
+
+for(let num in numbers) {
+	console.log(num*2);
+}
+```
+
+## Assignment ##
+
+```javascript
+
+for(let i=1; i<=20; i++) {
+	if (i%3 == 0) {
+		console.log(i);
+	}
+}