Zig Zag Star and Number Pattern in Java

In the previous section, we have discussed different pattern programs in Java. In this section, we will create Java programs for zig zag star and number patterns.

Steps to Print Zig Zag Number Pattern

Print one backward slash first then one forward slash and continue.
Enter the total characters in a row and store it an integer variable say row.
Enter the total number of zig zag lines and store it in an integer variable say count.
To print Backward slash:
- Take first for loop to print all the rows.
- Take an inner loop to print the column values.
- Then go on printing the numbers according to the iteration.
To print forward slash:
- Take first for loop to print all the rows.
- Take inner loop to print the column values.
- Then go on printing the numbers according to the iteration.

Let's implement the above steps in a Java program.

ZigZagNumberPattern.java

import java.util.Scanner;
public class ZigZagNumberPattern
{
    public static void main(String[] args) 
    {
        // Take user input for no for rows 
        System.out.print("Enter the no of characters in a line = ");
        Scanner sc= new Scanner(System.in);
        int r,c,row;
        //starting ASCII value taken 64
        int ascii=64;
        // store the input value in row
        row=sc.nextInt();
         System.out.print("Enter the no of zig zag line = ");
        int count=sc.nextInt();
        
        for (int i=1;i<=count;i++)
        {
        
            // backward
           for(r=1; r<=row; r++)
           {   
               // inner loop to print number
              for(c=1; c<=row; c++)
              {   
                  // if row and column have same value print symbol     
                 if(r==c)      
                    System.out.print(r+" ");      
                 else          
                    System.out.print("  ");      
              } 
              System.out.println("");
           } 
           
           // forward
            for(r=1;r<=row;r++)
            {
              // loop for printing number 
              for(c=1;c<=row;c++)
              {
                    // if c<= row+1-r print symbol else spaces
                    if(c <= (row+1-r))
                    {
                       if( c == (row+1-r) )
                          System.out.print(r+" ");
                       else
                          System.out.print("  ");
                    }
              }
              System.out.println("");
           }
        }
    }
}

Output:

Zig Zag Star Pattern

ZigZagStarPattern.java

import java.util.Scanner;
public class ZigZagStarPattern
{
    public static void main(String[] args) 
    {
        // Take user input for no for rows 
        System.out.print("Enter the number of characters in a line you want to print: ");
        Scanner sc= new Scanner(System.in);
        int r,c,row;
        // store the input value in row
        row=sc.nextInt();
         System.out.print("Enter the number of zig zag line you want to print: ");
        int count=sc.nextInt();
        System.out.print("Enter any character: ");
        char ch=sc.next().charAt(0);
        
        for (int i=1;i<=count;i++)
        {
        
            // backward
           for(r=1; r<=row; r++)
           {   
               // inner loop to print symbol
              for(c=1; c<=row; c++)
              {   
                  // if row and column have same value print symbol     
                 if(r==c)      
                    System.out.print(ch+" ");      
                 else          
                    System.out.print("  ");      
              } 
              System.out.println("");
           } 
           
           // forward
            for(r=1;r<=row;r++)
            {
              // loop for printing star symbol
              for(c=1;c<=row;c++)
              {
                    // if c<= row+1-r print symbol else spaces
                    if(c <= (row+1-r))
                    {
                       if( c == (row+1-r) )
                          System.out.print(ch+" ");
                       else
                          System.out.print("  ");
                    }
              }
              System.out.println("");
           }
        }
    }
}

Output: