Program for triangular pattern (mirror image around 0)

Given the value of n, print the pattern.

Examples :

Input : n = 5
Output : 
    0
   101
  21012
 3210123
432101234

Input : n = 7
Output : 
      0
     101
    21012
   3210123
  432101234
 54321012345
6543210123456

Below is the program to print the above pattern

C++

filter_none

edit
close

play_arrow

link
brightness_4
code

// C++ Implementation to print the pattern
#include <bits/stdc++.h>
using namespace std;
  
// Function definition
void print(int n)
{
    int var1 = 1, var2 = 1;
  
    // Outer for loop to keep
    // track of number of lines
    for (int i = 0; i < n; i++) {
        // for loop to keep track
        // of spaces
        for (int j = n - 1; j > i; j--) {
            cout << " ";
        }
  
        // for loop to print the
        // digits in pattern
        for (int k = 1; k <= var1; k++) {
            cout << abs(k - var2);
        }
  
        var1 += 2;
        var2++;
        cout << "\n";
    }
}
  
// Driver code
int main()
{
    // taking size from the user
    int n = 5;
  
    // function calling
    print(n);
      
    return 0;
}

chevron_right


Java

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java Implementation to print the pattern
  
class GFG
{
    // Function definition
    static void print(int n)
    {
        int var1 = 1, var2 = 1;
      
        // Outer for loop to keep
        // track of number of lines
        for (int i = 0; i < n; i++) 
        {
            // for loop to keep track
            // of spaces
            for (int j = n - 1; j > i; j--) 
            {
                System.out.print(" ");
            }
      
            // for loop to print the
            // digits in pattern
            for (int k = 1; k <= var1; k++) 
            {
                System.out.print(Math.abs(k - var2));
            }
      
            var1 += 2;
            var2++;
            System.out.println();
        }
    }
      
    // Driver code
    public static void main (String[] args) 
    {
        // taking size from the user
        int n = 5;
      
        // function calling
        print(n);
    }
}
  
// This code is contributed by Anant Agarwal.

chevron_right


Python3

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python Implementation to 
# print the pattern
  
# Function definition
def printt(n):
  
    var1 = 1
    var2 = 1
   
    # Outer for loop to keep
    # track of number of lines
    for i in range(n):
  
        # for loop to keep track
        # of spaces
        for j in range(n - 1,i,-1):
            print(" ", end = "")
  
        # for loop to print the
        # digits in pattern
        for k in range(1, var1 + 1):
            print(abs(k - var2), end="")
          
        var1 += 2
        var2 += 1
        print()
  
# Driver code
# taking size from the user
n = 5
   
# function calling
printt(n)
  
# This code is contributed
# by Anant Agarwal.

chevron_right


C#

filter_none

edit
close

play_arrow

link
brightness_4
code

//C# Implementation to print the pattern
using System;
class GFG
{
    // Function definition
    static void print(int n)
    {
        int var1 = 1, var2 = 1;
      
        // Outer for loop to keep
        // track of number of lines
        for (int i = 0; i < n; i++) 
        {
            // for loop to keep track
            // of spaces
            for (int j = n - 1; j > i; j--) 
            {
                Console.Write(" ");
            }
      
            // for loop to print the
            // digits in pattern
            for (int k = 1; k <= var1; k++) 
            {
            Console.Write(Math.Abs(k - var2));
            }
      
            var1 += 2;
            var2++;
            Console.WriteLine();
        }
    }
      
    // Driver code
    public static void Main () 
    {
        // taking size from the user
        int n = 5;
      
        // function calling
        print(n);
    }
}
  
// This code is contributed by vt_m.

chevron_right


PHP

filter_none

edit
close

play_arrow

link
brightness_4
code

<?php
// PHP Implementation to
// print the pattern
  
// Function definition
function print1($n)
{
    $var1 = 1;
    $var2 = 1;
  
    // Outer for loop to keep
    // track of number of lines
    for ($i = 0; $i < $n; $i++) 
    {
        // for loop to keep track
        // of spaces
        for ($j = $n - 1; $j > $i; $j--) 
        {
            echo " ";
        }
  
        // for loop to print the
        // digits in pattern
        for ($k = 1; $k <= $var1; $k++) 
        {
            echo abs($k - $var2);
        }
  
        $var1 += 2;
        $var2++;
        echo "\n";
    }
}
  
// Driver code
$n = 5;
print1($n);
  
// This code is contributed by mits 
?>

chevron_right



Output :

    0
   101
  21012
 3210123
432101234


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.



Improved By : Mithun Kumar