which method is used to write on webpage in visual studio code example

Example 1: doest all the methos in interface need to implement c#

You have two choices:

- implement every method required by the interface
or
- declare the missing methods abstract in your class. This forces you
to declare your class abstract and, as a result, forces you to
subclass the class (and implement the missing methods) before you
can create any objects.

Example 2: how to use the map method in javascript

const numbers = [1, 2, 3, 4, 5]; 

const bigNumbers = numbers.map(number => {
  return number * 10;
});

Example 3: how to use the this keyword in java

class Other{
    public double num;
    public Other(int num){
        this.num = num;
        System.out.println(num);
      	//print 5 to the console
    }
}

class scratch{
    public static void main(String[] args) {
        Other method = new Other(5);
        System.out.println(method.num);
      	//prints 5.0 to the console
    }
}