Question:

Consider the following class:

public class Rectangle {
    private int length;
    private int width;
    
    public Rectangle(int l, int w) {
        length = l;
        width = w;
    }
}

1. What is the purpose of the constructor in the Rectangle class?

   a) To assign a value to the length variable b) To assign a value to the width variable c) To create an instance of the Rectangle class d) To initialize the length and width variables with given values

Answer:

The correct option is d) To initialize the length and width variables with given values.

The purpose of a constructor in a class is to initialize the instance variables of an object. In this case, the constructor Rectangle(int l, int w) takes two parameters l and w, which represent the length and width of the rectangle, respectively. The constructor then assigns these parameter values to the length and width instance variables of the Rectangle object being created.

By initializing the length and width variables with the given values in the constructor, we ensure that every Rectangle object created has its length and width set to specific values. This allows the object to be used consistently throughout the program by accessing its properties using getter and setter methods or other member functions.