Designing Patterns - Print 'O'.

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SOURCE CODE

import java.io.*;
import java.util.*;
public class O
{
    public static void main(String args[])
    {
        Scanner sc=new Scanner (System.in);
        System.out.print("Enter a odd number >=5 :");
        int n=sc.nextInt();
        int a=n/2+1;
        System.out.println("\n");
        if(n>=5&& n%2!=0 )           
        {
            for(int i=1;i<=n;i++)
            {
                for(int j=1;j<=n;j++)
                {
                    if(((i==1 ||i==n)&&(j>1&&j<n))||((j==1 ||j==n)&&(i>1&&i<n)))
                    {
                        System.out.print("O ");
                    }
                    else
                        System.out.print("  ");
                }
                System.out.println();
            }
        }
        else
            System.out.println("Invalid Input");
    }
}

OUTPUT



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