Java: Display n terms of natural numbers and their sum

Last update on March 11 2025 11:03:44 (UTC/GMT +8 hours)

Natural Numbers and Their Sum

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

Test Data
Input number: 7

Pictorial Presentation:

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:

For more Practice: Solve these Related Problems:

• Write a Java program to display the first n natural numbers and their sum using recursion.
• Write a Java program to generate natural numbers using a loop and compute separate sums for even and odd numbers.
• Write a Java program to input n and display the natural numbers along with a running total for each term.
• Write a Java program to use Java streams to display natural numbers up to n and calculate their sum.

Java Code Editor:

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