w3resource

Java Conditional Statement Exercises: Display n terms of natural numbers and their sum

Java Conditional Statement: Exercise-11 with Solution

Write a program in Java to display n terms of natural numbers and their sum.

Test Data
Input number: 7

Pictorial Presentation:

Java conditional statement Exercises: Display n terms of natural numbers and their sum

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise11 {

    
  public static void main(String[] args)

{
   int i, n, sum=0;
   {
   Scanner in = new Scanner(System.in);  
        System.out.print("Input number: ");  
         n = in.nextInt();
}
  System.out.println("The first n natural numbers are : "+n);
  
 for(i=1;i<=n;i++)
   {
     System.out.println(i);
     sum+=i;
   }
System.out.println("The Sum of Natural Number upto "+n+ " terms : " +sum);

}
}

Sample Output:

Input number: 7                                                                                               
The first n natural numbers are : 7                                                                           
1                                                                                                     
2                                                                                                     
3                                                                                                     
4                                                                                                     
5                                                                                                     
6                                                                                                     
7                                                                                                     
The Sum of Natural Number upto n terms : 28   

Flowchart:

Flowchart: Java Conditional Statement Exercises - Display n terms of natural numbers and their sum

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in Java to display the first 10 natural numbers.
Next: Write a program in Java to input 5 numbers from keyboard and find their sum and average.

What is the difficulty level of this exercise?



Inviting useful, relevant, well-written and unique guest posts