Question

1. Write a Java program that uses a while loop to do the following:
   • Repeatedly asks the user to enter a number or -1 to exit the program.
   • Keeps track of the smallest and largest numbers entered so far:
     • You will need a variable for the smallest number and another variable for the largest number.
     • Read the first number the user enters, and if it is not -1 set the smallest and largest variables to that number.
     • Use a loop to gather the remaining input. Each time the user enters a new number that is not -1, compare it to the variables and update them if necessary.
   • When the user enters -1, display the smallest and largest numbers that the user entered. If the user did not enter any numbers before entering -1, then simply exit the program.
2. Run the program and test it on several different sets of values to see if it works.
3. Modify the program to ask the user how many numbers they wish to enter and use a for loop to ask for that many numbers. The sentinel value of -1 should no longer be necessary.
4. Run the program and test it on several different sets of values to see if it works.
5. Here is a sample output of the program

How many numbers do you wish to enter? 5

Please enter a number: 8

Please enter a number: 9

Please enter a number: 12

Please enter a number: 15

Please enter a number: 3

The minimum number is 3 and the maximum number is 15.

Answer 1

CODE IN JAVA:

import java.util. * ;
public class main {
  
   public static void main(String[] args) {
      
       Scanner sc = new Scanner(System.in);
       int min = 999999, max = -99999;
       System.out.print("How many numbers do you wish to enter? ");
       int n = sc.nextInt();
       for(int i = 1; i <= n; i++) {
           System.out.print("Please Enter a number: ");
           int number = sc.nextInt();
           if(number > max)
               max = number ;
           if(number < min)
               min = number ;
       }
       System.out.println("The minimum number is " + min + " and the maximum number is " + max + ".");
   }

}

OUTPUT: