Write a complete java program, called MyProgram, that has the following properti

Question

Write a complete java program, called MyProgram, that has the following properties: A method, called computeSum, that receives 2 integer values, say A and B, and returns the sum of all values between A and B (including A and B). A must be less than B for the method to return the sum. Otherwise the method returns 0. No printing inside the method. A method, called isPrime, that receives the sum and determines if the sum is a prime number by returning true if the number is prime and false if the number is not prime. No printing inside the method. Sample Runs Enter 2 numbers: 2 4 Output is 9 9 is not a prime number

Explanation / Answer

import java.util.Scanner;

public class MyProgram {

   //function to add number between a and b
   public int computeSum(int a, int b) {
       int total=0;
       if(b<a) {
           return 0;
       }else {
          
           for(int i=a;i<=b;i++) {
               total = total + i;
           }
           return total;
       }
      
      
   }
   //function to check prime number
   public boolean isPrime(int num) {
      
       if(num==1||num==2) {
           return true;
       }else {
           for(int i=2;i<num/2;i++) {
               if(num%i==0) {
                   return false;
               }
           }
       }
       return true;
   }
  
  
   public static void main(String[] args) {
       int num1, num2;
       MyProgram mp = new MyProgram(); //create object
       System.out.print("Enter 2 Numbers : ");
       Scanner scan = new Scanner(System.in);
       num1 = scan.nextInt();//scan first number
       num2 = scan.nextInt(); //scan second number
       int total = mp.computeSum(num1, num2); //call computeSum method
       System.out.println("Output is "+total); //call isprime method
       boolean bool = mp.isPrime(total);
       if(bool) {
           System.out.println(total+" is prime number");
       }else {
           System.out.println(total+" is not prime number");
       }
   }
  
}

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