constructor in typescript

1class Info {
2  private name: string ;
3  constructor(n:string){
4    this.name = n ;
5  };
6  describe(){
7    console.log(`Your name is  ${this.name}`);
8  }
9}
10
11const a = new Info('joyous');
12a.describe();

1class Car { 
2   //field 
3   engine:string; 
4 
5   //constructor 
6   constructor(engine:string) { 
7      this.engine = engine 
8   }  
9
10   //function 
11   disp():void { 
12      console.log("Engine is  :   "+this.engine) 
13   } 
14}

1class Animal {
2  move(distanceInMeters: number = 0) {
3    console.log(`Animal moved ${distanceInMeters}m.`);
4  }
5}
6
7class Dog extends Animal {
8  bark() {
9    console.log("Woof! Woof!");
10  }
11}
12
13const dog = new Dog();
14dog.bark();
15dog.move(10);
16dog.bark();Try