script.js

// Question 1 
// Declaring a Variable

let number = 8;

// Check if number is Odd or Even 

// The % is the modular operator here.

if (number % 2 === 0) {
    console.log(number + " is even.");
    } else {
    console.log(number + " is odd.");
}


// Question 2
// Declaring Age

let age = 21;

// Check if user is eligible to vote

if (age >= 17) {
    console.log("You are eligible to vote");
} else {
    console.log("You are not eligible to vote");
}


// Question 3

// Grade Calculator

let score = 50;

// Prints A when score is higher than 70
if (score >= 70) {
    console.log("Grade A");
    // Prints B when score is higher than 60
} else if(score >= 60) {
    console.log("Grade B");
    // Prints C when score is higher than 50
} else if (score >= 50) {
    console.log("Grade C");
    // Prints Fail when score is lower than 50
} else if(score <50) {
    console.log("Fail");
}

// Question 4

// Declaring Variable for username and password

let username = "admin";
let password = "1234a";


if(username === "admin" && password === "12344a"){
    console.log("Log in Successful")
} else {
    console.log("Invalid Credentials")
}

// OR 

// Stored Credentials 
let userName = "Peter";
let passWord = "1234ab";


// Credentials to check
    let inputUsername = "Peter";
    let inputpassWord = "1234ab";


if(inputUsername === userName && inputpassWord === passWord ){
    console.log("Log in Successful")
} else {
    console.log("Invalid Credentials")
}


// Question 5

// Profuct Discount Calculator

let product = {
    name: "Laptop",
    price: 20000,
    isMember: true
};

// Final price for members is different from non members
// variable is declared  without value because we don't know yet

let finalPrice;

// Apply discount rule

if(product.isMember){
    finalPrice = product.price * 0.9; //10% discount 
} else {
    finalPrice = product.price;
}

 console.log("Product:", product.name);
 console.log("Final Price:", finalPrice);