JavaScript-Journey/02-variables.html at main · oxidara/JavaScript-Journey · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Variables</title>
    <script>

        // Variable Type
        // Variable Name
        // Variable Value -> Data Types
        // ----------------------------
        // Data Types
        // Primitive -> boolean, null, number, string
        // Composite -> Objects, Functions, Arrays

        var salary;

        name = "Zainab"; // String
        age = 11; // Number
        cnic = null; // Null
        isVerified = true; // Boolean
        salary = 12000; // Number Also

        // document.writeln(typeof(name));
        // document.writeln(typeof(age));
        // document.writeln(typeof(cnic));
        // document.writeln(typeof(isVerified));

        studentDetails = {
            name: "Arham",
            age: 18,
            school: "TBISS",
            subject: "Computer",
            f_phone_number: 923001234567
        }

        employeeDetails = {
            name: "Shah Zubair",
            martial_status: "Married",
            father_name: "Murtaza Kamal",
            position: "Tea Maker",
            salary: 14999,
            phone_number: "+923347328923",
            currency: "PKR"
        }

        console.log(employeeDetails.father_name);

        fruits = [
            'Orange',
            'Mango',
            'Peach',
            true,
            1200,
            null,
            false
        ]

        document.write("1. " + fruits[0] + "<br>");
        document.write("2. " + fruits[1] + "<br>");
        document.write("3. " + fruits[2] + "<br>");
        document.write("4. " + fruits[3] + "<br>");
        document.write("5. " + fruits[4] + "<br>");
        document.write("6. " + fruits[5] + "<br>");
        document.write("7. " + fruits[6] + "<br>");

        // document.write("Name: " + employeeDetails.name);
        // document.write(JSON.stringify(employeeDetails));
        // console.log(employeeDetails.name);

        // Nested Object

        students = {
            std1 : {
                name: "Arham Chandio",
                age: 12,
                rollno: 1234
            },
            std2 : {
                name: "Majid Chandio",
                age: 12,
                rollno: 1234
            }
        }

        document.write(students.std1);

    </script>
</head>
<body>
    <!-- It will be empty because we are working on JavaScript -->
</body>
</html>