Write a Java-program to print sum of even or odd numbers based on the N value using while loop ?

Write a Java-program to print sum of even or odd numbers based on the N value using while loop ?

Program

public class Main
{
    public static void main(String args[])
    {
        int x=1,n=5,sum=0;
        if(n%2==0)
        {
            while(x<=n)
            {  
                if(x%2==0)
                {
                    sum=sum+x; 
                }
                x++;
            }
        }
        else
        {
            while(x<=n)
            {  
                if(x%2!=0)
                {
                    sum=sum+x; 
                }
                x++;
            }
        }
        System.out.print(sum);
    }
}	

9

Using CommandLine Arguments

public class Main
{
    public static void main(String args[])
    {
        int x=1,n,sum=0;
        n=Integer.parseInt(args[0]);
        if(n%2==0)
        {
            while(x<=n)
            {  
                if(x%2==0)
                {
                    sum=sum+x; 
                }
                x++;
            }
        }
        else
        {
            while(x<=n)
            {  
                if(x%2!=0)
                {
                    sum=sum+x; 
                }
                x++;
            }
        }
        System.out.print(sum);
    }
}	

9

Using Scanner Class

import java.util.*;
public class Main
{
    public static void main(String args[])
    {
        int x=1,n,sum=0;
        Scanner s=new Scanner(System.in);
        System.out.println("Enter n value : ");
        n=s.nextInt();
        if(n%2==0)
        {
            while(x<=n)
            {  
                if(x%2==0)
                {
                    sum=sum+x; 
                }
                x++;
            }
        }
        else
        {
            while(x<=n)
            {  
                if(x%2!=0)
                {
                    sum=sum+x; 
                }
                x++;
            }
        }
        System.out.print(sum);
    }
}	

Enter n value : 5
9

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