Summary  
This chapter explains how the public access modifier in TypeScript makes class properties and methods accessible from anywhere by default, clarifying member visibility and usage.  

General domain of usage  
Data modeling

In TypeScript, the **public** access modifier is used to specify that a class property or method can be accessed from anywhere: inside the class, by instances of the class, and even from code outside the class. In fact, if you do not explicitly specify an access modifier for a class member, TypeScript treats it as `public` by default. This means your class members are open for access unless you intentionally restrict them.

class Car {
  public make: string;
  public model: string;

  public start(): void {
    console.log(`${this.make} ${this.model} is starting.`);
  }
}

const myCar = new Car();
myCar.make = "Toyota";
myCar.model = "Corolla";
myCar.start(); // Output: Toyota Corolla is starting.

Using **public** members is useful when you want to allow other parts of your code to interact freely with your class. For example, if you are building a data model where all properties should be accessible and modifiable, declaring them as public makes your intent clear and keeps your code straightforward. However, you should use public members thoughtfully to avoid exposing implementation details that might be better kept private or protected in future code changes.

What is the default access modifier for class members in TypeScript if none is specified?

Deepen your understanding of object-oriented programming with TypeScript by working with classes, encapsulation, interfaces, generics, and inheritance. Learn how to structure reusable components, enforce contracts, and design scalable class hierarchies.

Build a strong foundation in TypeScript classes by defining properties, methods, constructors, and static members. Learn how class structure improves clarity, reusability, and code organization.

Control visibility and encapsulation using public, private, and protected members. Apply these modifiers to create safer, more predictable class designs that hide implementation details and expose only what is needed.

Use abstract classes and interfaces to enforce structure and define contracts between components. Explore how these tools support scalable architecture and help manage complex object relationships.

Write flexible, type-safe classes by applying generics to class definitions and methods. Create reusable patterns that adapt to multiple data types while maintaining strong typing.

Build class hierarchies with inheritance and leverage polymorphism to create extendable systems. Learn how method overriding, super calls, and shared behavior support clean and maintainable object-oriented design.

Public Members

1. What is the default access modifier for class members in TypeScript if none is specified?

2. Fill in the blank to declare a public property in a class:

Awesome!

Public Members

1. What is the default access modifier for class members in TypeScript if none is specified?

2. Fill in the blank to declare a public property in a class: