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Java: Display the n terms of odd natural number and their sum

Java Conditional Statement: Exercise-15 with Solution

Write a Java program that displays the sum of n odd natural numbers.

Test Data
Input number of terms is: 5

Pictorial Presentation:

Java conditional statement Exercises: Display the n terms of odd natural number and their sum

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise15 {

   public static void main(String[] args)

{
   int i,n,sum=0;

   System.out.print("Input number of terms is: ");
{
   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);

}
}
}

Sample Output:

Input number of terms is: 5                                                                                   
The odd numbers are :                                                                                         
1                                                                                                       
3                                                                                                       
5                                                                                                       
7                                                                                                       
9                                                                                                       
The Sum of odd Natural Number upto 5 terms is: 25

Flowchart:

Flowchart: Java Conditional Statement Exercises - Display the n terms of odd natural number and their sum

Java Code Editor:

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Java: Tips of the Day

IsPowerOfTwo

Checks if a value is positive power of two.

To understand how it works let's assume we made a call IsPowerOfTwo(4).

As value is greater than 0, so right side of the && operator will be evaluated.

The result of (~value + 1) is equal to value itself. ~100 + 001 => 011 + 001 => 100. This is equal to value.

The result of (value & value) is value. 100 & 100 => 100.

This will value the expression to true as value is equal to value.

public static boolean isPowerOfTwo(final int value) {
    return value > 0 && ((value & (~value + 1)) == value);
}

Ref: https://bit.ly/3sA5d4I

 





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