Question

Question 1: 5pts

Write a program to receive two integers as user input and then print:

1. Sum
2. Difference
3. Product
4. Average
5. Maximum of the two
6. Minimum of the two

You may use the min and max functions declared in the math class.

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Question 2: 10pts

An online bank wants you to create a program that will show a prospective customer, how the deposit will grow. Your program should read the initial balance and the annual interest rate. Interest rate is compounded monthly. Print out the balance for first three months.

For example:

Initial balance: 1000

Annual interest rate: 6.0

Balance after first month: 1005.00

Balance after second month: 1010.03

Balance after third month: 1015.08

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Question 3: 5pts

Scan a string as user input and print the following: (i) the first character, (ii) The last character.

For example:

String: Java

First letter: J

Last letter: a

Hint: use the length() and charAt() functions from String class.

Answer 1

Question 1)

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
   Scanner sc=new Scanner(System.in);
   System.out.print("Enter first integer : ");
   int n1=sc.nextInt(); //n1 as first integer input
   System.out.print("Enter second integer : ");
   int n2=sc.nextInt(); //n2 as second integer input
   System.out.println("Sum : "+(n1+n2)); //print sum
   System.out.println("Difference : "+(n1-n2)); //print diffference
   System.out.println("Product : "+(n1*n2)); //print product
   System.out.println("Average : "+(double)(n1+n2)/2); //print average
   System.out.println("Maximum : "+Math.max(n1,n2)); //print maximum using max function
       System.out.println("Minimum : "+Math.min(n1,n2)); //print Minimum using min function
   }
}

Output:

Question 2)

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
   Scanner sc=new Scanner(System.in);
   System.out.print("Initial balance: ");
   double bal=sc.nextDouble(); //bal as initial balance
   System.out.print("Annual interest rate : ");
   double rate=sc.nextDouble(); //rate as annual interest rate
   double rate_p_m=rate/12; //convert into per month rate
   double bal1=bal+(bal*rate_p_m/100); //balance after 1st month
   double bal2=bal1+(bal1*rate_p_m/100); //after 2nd month
   double bal3=bal2+(bal2*rate_p_m/100); //after 3rd month
   System.out.println("Balance after first month: "+bal1); //print Balance after 1st month
   System.out.println("Balance after second month: "+bal2); //print balance after 2nd month
   System.out.println("Balance after third month: "+bal3); //print balance after 3rd month
     
   }
}

Output:

Question 3)

  
import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
   Scanner sc=new Scanner(System.in);
   System.out.print("Enter string: ");
   String s=sc.nextLine(); //Read the line to store the string in s
   System.out.println("First letter: "+s.charAt(0)); //charAt(0) will give first letter
  
   //As strings are zero indexed ,the last index will be (length-1)
   System.out.println("Last letter: "+s.charAt(s.length()-1));
     
   }
}

Output: