Palindromic pyramid pattern using java

October 7, 2020

Palindromic pyramid pattern

The palindromic number are the number whose reverse is equal to the original number.

For example- 12321 is a original number whose reverse is same as the original number, that is 12321

So, here we learn how to print the pyramid pattern on palindromic number or word.

1. Write a program to print the following pattern.

Enter the row 5

    1
   121
  12321
 1234321
123454321

Working

Step 1- Initialize the there variable for the loop

Step 2- the first loop is for the the row, in how many row you want to print data.

Step 3- the second loop is for the spaces, the space print in the row from i to row-1.

Step 4- the third loop is for the the print element from i to row.

Step 5- print j.

Step 6. the forth loop is for print reverse number.

Step 7- print j.

Step 8. Stop.

JAVA

#include <stdio.h>  
int main()  
{
    int n, i, j;
    printf("Enter number of rows : ");
    scanf("%d",&n);
    for(i=1; i<=n; i++)
    {
        for(j=i; j<=n; j++)
        {
            printf(" ");
        }
        for(j=1; j<=i; j++)
        {
            printf("%d",j);
        }
        for(j=i-1; j>=1; j--)
        {
            printf("%d",j);
        }
        printf("\n");
    }
    return 0;
}

JAVA

import java.util.Scanner;

public class Main
{
    public static void main(String[] args) 
    {
        int i,j;
        //Scanner class declaration
        Scanner sc = new Scanner(System.in);
        //input from user
        System.out.print("Enter the row");
        int row = sc.nextInt();
        //declare for loop for every new row
        for(i=1;i<=row;i++)
        {
            //this lopp is for the space
            for(j=i;j<=row;j++)
                System.out.print(" ");
            //this loop is for print number 1 to i
            for(j=1;j<=i;j++)
                System.out.print(j+"");
            //this loop is for the number in reverse order
            for(j=i-1;j>=1;j--)
                System.out.print(j+"");
            System.out.println();
         }
    }
}

2. Write a program to print the following pattern

Enter the row 5                                                                                                             

     A                                                                                                                     
    ABA                                                                                                                    
   ABCBA                                                                                                                   
  ABCDCBA                                                                                                                  
 ABCDEDCBA

JAVA

#include <stdio.h>  
int main()  
{
    int n, i, j;
    printf("Enter number of rows : ");
    scanf("%d",&n);
    for(i=1; i<=n; i++)
    {
        for(j=i; j<=n; j++)
        {
            printf(" ");
        }
        for(j=1; j<=i; j++)
        {
            printf("%c",j+64);
        }
        for(j=i-1; j>=1; j--)
        {
            printf("%c",j+64);
        }
        printf("\n");
    }
    return 0;
}

JAVA

import java.util.Scanner;
public class Main
{
      public static void main(String[] args) 
      {
          int i,j,k;
          //scanner class declaration          
          Scanner sc=new Scanner(System.in);
          //enter user input
          System.out.print("Enter the row");
          int row = sc.nextInt();
          //this loop is for the every new row
          for(i=1;i<=row;i++)
          {
              // this loop is for the space from i to row
              for(j=i;j<=row;j++)
                    System.out.print(" ");
              //this loop is for print alphabet A to (J+64)
              for(j=1;j<=i;j++)
                    System.out.print((char)(j+64)+"");
               // this loop is for the reverse order of alphabet
              for(k=i-1;k>=1;k--)
                    System.out.print((char)(k+64)+"");
              System.out.println();
           }
        }
}

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Palindromic pyramid pattern using java