Java Program to Print X Number Pattern

In this Java pattern program, we show the steps to print the number in an X pattern using for loop, while loop, and functions. The below program accepts the user-entered rows and uses the nested for loop and if else to traverse the rows and columns. Next, the program will print the X pattern of numbers.

import java.util.Scanner;

public class Example 
{
	private static Scanner sc;
	
	public static void main(String[] args) 
	{
		sc = new Scanner(System.in);
		int rows, i, j;
		
		System.out.print("Enter Numbers of Rows = ");
		rows = sc.nextInt();
		
		for (i = 0 ; i < rows; i++ ) 
		{
			for (j = 0 ; j < rows; j++ ) 	
			{
				if (i == j || j == rows - 1 - i)
				{
					System.out.printf("%d", j + 1);
				}
				else
				{
					System.out.printf(" ");
				}
			}
			System.out.println();
		}
	}
}

Enter Numbers of Rows = 12
1          12
 2        11 
  3      10  
   4    9   
    5  8    
     67     
     67     
    5  8    
   4    9   
  3      10  
 2        11 
1          12

Within this program, we replaced the for loop with a while loop to traverse the rows and columns and print the X shape number pattern. For more Number pattern programs, please click here.

import java.util.Scanner;

public class Example 
{
	private static Scanner sc;
	
	public static void main(String[] args) 
	{
		sc = new Scanner(System.in);
		int rows, i, j;
		
		System.out.print("Enter Numbers of Rows = ");
		rows = sc.nextInt();
		
		i = 0 ; 
		while (i < rows ) 
		{
			j = 0 ; 
			while (j < rows ) 	
			{
				if (i == j || j == rows - 1 - i)
				{
					System.out.printf("%d", j + 1);
				}
				else
				{
					System.out.printf(" ");
				}
				j++;
			}
			System.out.println();
			i++;
		}
	}
}

Enter Numbers of Rows = 17
1               17
 2             16 
  3           15  
   4         14   
    5       13    
     6     12     
      7   11      
       8 10       
        9        
       8 10       
      7   11      
     6     12     
    5       13    
   4         14   
  3           15  
 2             16 
1               17

In this Java pattern program, we created an XNumPattern function to print the X number pattern on each row.

import java.util.Scanner;

public class Example 
{
	private static Scanner sc;
	
	public static void main(String[] args) 
	{
		sc = new Scanner(System.in);
		
		System.out.print("Enter Numbers of Rows = ");
		int rows = sc.nextInt();
		
		XNumPattern(rows);
		
	}
	public static void XNumPattern(int rows) 
	{
		for (int i = 0 ; i < rows; i++ ) 
		{
			for (int j = 0 ; j < rows; j++ ) 	
			{
				if (i == j || j == rows - 1 - i)
				{
					System.out.printf("%d", j + 1);
				}
				else
				{
					System.out.printf(" ");
				}
			}
			System.out.println();
		}
	}
}