TypeScript Student Class with Private and Protected Properties

TypeScript Classes and OOP : Exercise-17 with Solution

Write a TypeScript class called Student with the following properties and methods:

• private name: string
• protected studentId: number

The class should have a constructor that accepts a name and student ID. Implement a method:

public displayInfo(): void that displays the student's name and ID.

Make sure that the studentId property is accessible only within the class and its subclasses.

Sample Solution:

TypeScript Code:

class Student {
  private name: string;
  protected studentId: number;

  constructor(name: string, studentId: number) {
    this.name = name;
    this.studentId = studentId;
  }

  public displayInfo(): void {
    console.log(`Student Name: ${this.name}, Student ID: ${this.studentId}`);
  }
}

// Example usage:
const student = new Student("Piri Lily", 12);
student.displayInfo(); 

Explanations:

In the exercise above -

• First, we define a "Student" class with a private property 'name' and a protected property 'studentID'.
• The constructor accepts a 'name' and a 'studentID' and initializes the properties accordingly.
• Next we implement a public method "displayInfo()" that displays the student's name and ID.
• The 'studentID' property is accessible only within the class and its subclasses, as requested.

Output:

"Student Name: Piri Lily, Student ID: 12"

TypeScript Editor:

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

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