1. Static Keyword
2. Virtual Keyword
3. Abstract Keyword
4. Final Keyword
5. Explicit keyword
6. This Keyword
7. new Keyword
8. const keyword
9. super keyword

1. Static Keyword

Static is something which is same for all instances

• Vehicle.numberOfWheels refers to a static property or method called numberOfWheels that belongs to the Vehicle type itself. This is accessed directly through the class name without creating an instance of the class.
• Vehicle().numberOfWheels is a bit different. Here, Vehicle() is an expression that creates a new instance of the Vehicle class. The numberOfWheels in this context would refer to an instance property or method of that newly created Vehicle object. If numberOfWheels is a static property, this syntax would not be typical or necessary because static properties are accessed on the type, not on an instance.

Example 1

class Vehicle {
    static var numberOfWheels = 4  // Static property belonging to the type
    var num = 23                   // Instance property belonging to each instance
}

// Accessing static property using the class name
print(Vehicle.numberOfWheels) // Outputs: 4

// Creating an instance of Vehicle and accessing an instance property
print(Vehicle().num) // Outputs: 23