Java Program to Print Reverse K Shape Character Pattern

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Program to Print Reverse K Shape Character Pattern

In the previous article, we have discussed Java Program to Print K Shape with Decreasing Character Pattern

In this program we are going to see how to print the Reverse K shape character pattern.

Example-1

When row value=6

ABC
  BC
    C
    C
  BC
ABC
Example-2:

When row value=10

ABCDE
  BCDE
    CDE
      DE
        E
        E
      DE
    CDE
  BCDE
ABCDE

Now, let’s see the actual program to print it.

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Approach:

  • Enter total row and store it in an integer variable row_count.
  • Take two outer for loops, one for the upper half and the other for the bottom.
  • Inside both the loops, take two inner for loops to print the space and the characters.
  • After each iteration print a new line.

Java Code to Print Reverse K Shape Character Pattern

import java.util.Scanner;
class Main
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
    
        //Taking number of rows as input from the user and
        //then dividing it by two to get the size of the halves
        System.out.print("Rows(Enter even number) : ");
        int row_count = scan.nextInt();
        row_count/=2;
        
    
        int row, col, alphaAscii;
        //row, col are iterator and 
        //the alphaAscii is the 
        //ASCII value holder initialized to hold 'A'
    
        //loop to print upper part of the pattern
        for (row = 0; row <= row_count - 1; row++)
        {
            //Resetting the value to 'A' after every iteration
            alphaAscii = 65;
            
            for (col = 0; col < row; col++)
            {
                //Inner loop to print space
                System.out.print(" ");
            }
            for (col = row; col <= row_count-1; col++)
            {
            
                System.out.print((char)(alphaAscii+col));
            }
            System.out.println();
        }
        
        //loop to print lower part of the pattern
        for (row = row_count - 1; row >= 0; row--)
        {
            //Resetting the value to 'A' after every iteration
            alphaAscii = 65;
            
            for (col = 0; col < row; col++)
            {
                    //Inner loop to print space
                    System.out.print(" ");
            }
             //Inner loop to print character
            for (col = row; col <= row_count-1; col++)
            {
                System.out.print((char)(alphaAscii+col));
            }
            System.out.println();
        }
    }
}


Output:

Rows(Enter even number) : 10

ABCDE
  BCDE
    CDE
      DE
        E
        E
      DE
    CDE
  BCDE
ABCDE

C Code to Print Reverse K Shape Character Pattern

#include <stdio.h>

int main()
{
    printf("Rows(Enter odd number) : ");
    int row_count;
    scanf("%d", &row_count);
    row_count /= 2;
    //Taking number of rows as input from the user and
    //then dividing it by two to get the size of the halves

    int row, col, alphaAscii;
    //row, col are iterator and the alphaAscii is the ASCII value holder

    for (row = 0; row <= row_count - 1; row++)
    {
        //loop to print upper part of the pattern
        alphaAscii = 65;
        //Resetting the value to 'A' after every iteration
        for (col = 0; col < row; col++)
        {
            //Inner loop to print space
            printf(" ");
        }
        for (col = row; col <= row_count - 1; col++)
        {
            //Inner loop to print character
            printf("%c", (char)(alphaAscii + col));
        }
        printf("\n");
    }
    for (row = row_count - 1; row >= 0; row--)
    {
        //loop to print lower part of the pattern
        alphaAscii = 65;
        //Resetting the value to 'A' after every iteration
        for (col = 0; col < row; col++)
        {
            //Inner loop to print space
            printf(" ");
        }
        for (col = row; col <= row_count - 1; col++)
        {
            //Inner loop to print character
            printf("%c", (char)(alphaAscii + col));
        }
        printf("\n");
    }
    return 0;
}


Output:

Rows(Enter even number) : 10

ABCDE
  BCDE
    CDE
      DE
        E
        E
      DE
    CDE
  BCDE
ABCDE

C++ Code to Print Reverse K Shape Character Pattern

#include <iostream>
using namespace std;
int main(int argc, char const *argv[])
{
    cout << "Rows(Enter even number) : ";
    int row_count;
    cin >> row_count;
    row_count /= 2;
    //Taking number of rows as input from the user and
    //then dividing it by two to get the size of the halves

    int row, col, alphaAscii = 65;
    //row, col are iterator and the alphaAscii is the ASCII value holder

    for (row = 0; row <= row_count - 1; row++)
    {
        //loop to print upper part of the pattern
        alphaAscii = 65;
        //Resetting the value to 'A' after every iteration
        for (col = 0; col < row; col++)
        {
            //Inner loop to print space
            cout << " ";
        }
        for (col = row; col <= row_count - 1; col++)
        {
            //Inner loop to print character
            cout << (char)(alphaAscii + col);
        }
        cout << endl;
    }
    for (row = row_count - 1; row >= 0; row--)
    {
        //loop to print lower part of the pattern
        alphaAscii = 65;
        //Resetting the value to 'A' after every iteration
        for (col = 0; col < row; col++)
        {
            //Inner loop to print space
            cout << " ";
        }
        for (col = row; col <= row_count - 1; col++)
        {
            //Inner loop to print character
            cout << (char)(alphaAscii + col);
        }
        cout << endl;
    }

    return 0;
}

Output:

Rows(Enter even number) : 10

ABCDE
  BCDE
    CDE
      DE
        E
        E
      DE
    CDE
  BCDE
ABCDE

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