TypeScript Car Class with Protected Properties

TypeScript Classes and OOP : Exercise-19 with Solution

Write a TypeScript program that creates a class called Car with the following properties and methods:

• protected make: string
• protected model: string

The class should have a constructor that accepts make and model. Implement a method:

public getCarInfo(): string that returns a string containing the make and model of the car.

Make sure that the make and model properties are only accessible within the class and its subclasses.

Sample Solution:

TypeScript Code:

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

  constructor(make: string, model: string) {
    this.make = make;
    this.model = model;
  }

  public getCarInfo(): string {
    return `Make: ${this.make}, Model: ${this.model}`;
  }
}
// Example usage:
const car = new Car("BMW", "X1");
console.log(car.getCarInfo());  

Explanations:

In the exercise above -

• First we define a "Car" class with two protected properties, 'make' and 'model'.
• The constructor accepts 'make' and 'model' and initializes these properties accordingly.
• Next we implement a public method "getCarInfo()" that returns a string containing the make and model of the car.
• The 'make' and 'model' properties are accessible only within the class and its subclasses, as requested.

Output:

"Make: BMW, Model: X1"

TypeScript Editor:

See the Pen TypeScript by w3resource (@w3resource) on CodePen.

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