Week 03 : Programming Assignments - NPTEL >> Programming In Java - 2025

Week 03 : Programming Assignment 1

Solution :

import java.util.*;
public class W03_P1 {
    public static void main(String[] args) {
        Scanner inr = new Scanner(System.in);
        int n = inr.nextInt();
		

        // Start
        // Upper part of the pattern
        for (int i = n; i >= 1; i--) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
        
        // Lower part of the pattern
        for (int i = 2; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            if (i != n) {
                     System.out.println();
          }
        }
		// End
		

    }
}

Week 03 : Programming Assignment 2

Solution :

import java.util.Scanner;
public class W03_P2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
		

        //Start
        // Use a for loop to find the factors of the number
        for (int i = 1; i <= num; i++) {
            if (num % i == 0) {
                System.out.print(i + " ");
            }
        }
		//End
		

    }
}

Week 03 : Programming Assignment 3

Solution :

import java.util.Scanner;
public class W03_P3{
    public static void main(String[] args) {
	   Scanner sc = new Scanner(System.in);
	   int num=sc.nextInt();
	   

	   // Start
	   //Use while loop to count number of digits in an integer
		int count = 0;
        while (num > 0) {
            num = num / 10;
            count++;
        }
        
        System.out.print(count);
		// End
		

 }
}

Week 03 : Programming Assignment 4

Solution :

import java.util.Scanner;

class Student {
    private String name;
    private int age;
	

	// Start
    // Constructor
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // Getter for name
    public String getName() {
        return name;
    }

    // Setter for name
    public void setName(String name) {
        this.name = name;
    }

    // Getter for age
    public int getAge() {
        return age;
    }

    // Setter for age
    public void setAge(int age) {
        this.age = age;
    }
	// End
	

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Read student name and age
        String name = scanner.next();
        int age = scanner.nextInt();

        Student student = new Student(name, age);

        System.out.print("Name: " + student.getName() + ", Age: " + student.getAge());

        scanner.close();
    }
}

Week 03 : Programming Assignment 5

Solution :

import java.util.Scanner;

class cls1 {
    void add(int p, int q) {
        System.out.println(p + q);
    }
}

//Start
// Subclass cls2 that extends cls1
class cls2 extends cls1 {
    void mul(int a, int b) {
        System.out.println(a * b);
    }

    void task(int a, int b) {
        System.out.print((a * a) + (b * b));
    }
}
// End

public class W03_P5 {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);

        cls2 obj = new cls2();
        int a = sc.nextInt();
        int b = sc.nextInt();

        obj.add(a, b);   // Inherited from cls1
        obj.mul(a, b);   // Defined in cls2
        obj.task(a, b);  // Defined in cls2

        sc.close();
    }
}