Introduction

In this demo I have used NetBeans IDE 8.2 for debugging purpose. But you can use any java programming language compiler as per your availability..

import java.util.Scanner;
public class JavaExcercise {
 
public static void main(String[] args)
 
{
   int i,n,sum=0;
 
   System.out.print("Enter number of terms: ");
{
   Scanner in = new Scanner(System.in);
            n = in.nextInt();
  System.out.println ("\nThe odd numbers are :");
   for(i=1;i<=n;i++)
 
   {
     System.out.println (2*i-1);
     sum+=2*i-1;
   }
   System.out.println ("The Sum of odd Natural Number upto " +n+" terms is: " +sum);
 
}
}
}

Result