Program to print pyramid pattern

Given a positive integer n. Task is to print the pyramid pattern as described in the examples below.

Examples:

Input : 2
Output :
        1
        22
        1

Input : 3
Output :
        1
        22
        333
        22
        1

Input : 5
Output : 
        1
        22
        333
        4444
        55555
        4444
        333
        22
        1

Algorithm:

//Print All Pattern
printPattern(int N)
    // Print upper pattern
    /* 1
       22
       333
       ...
       N...(N)times   */
    for i->1 to N
        for j->1 to i
            print i
        print next line

    // Print lower triangle
    /* N-1....(N-1)times
       ...
       333
       22
       1 */
    for i->N-1 to 0
        for j->i to 0
            print i
        print next line

C++

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// C++ program to print the pyramid pattern
#include <bits/stdc++.h>
using namespace std;
  
// Print the pattern upto n
void printPattern(int n)
{
    // Printing upper part
    for (int i = 1; i <= n; i++) 
    {
        for (int j = 1; j <= i; j++) 
            cout << i;        
        cout << "\n";
    }
  
    // printing lower part
    for (int i = n - 1; i > 0; i--) 
    {
       for (int j = i; j > 0; j--) 
            cout << i;        
        cout << "\n";
    }
}
  
// Driver Code
int main()
{
    int n = 8;
    printPattern(n);
    return 0;
}

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Java














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// Java program to print the pyramid pattern 


  


class GFG { 


      


// Print the pattern upto n 


static void printPattern(int n)  


{ 


    // Printing upper part 


    for (int i = 1; i <= n; i++) { 


    for (int j = 1; j <= i; j++) 


        System.out.print(i); 


    System.out.print("\n"); 


    } 


  


    // printing lower part 


    for (int i = n - 1; i > 0; i--) { 


    for (int j = i; j > 0; j--) 


        System.out.print(i); 


    System.out.print("\n"); 


    } 


} 


  


// Driver code 


public static void main(String arg[])  


{ 


    int n = 8; 


    printPattern(n); 


} 


} 


  


// This code is contributed by Anant Agarwal. 



















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Python3














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# Python program to print 


# the pyramid pattern 


  


# Print the pattern upto n 


def printPattern(n): 


  


    # Printing upper part 


    for i in range(n+1):  


      


        for j in range(1,i+1): 


            print(i,end="")         


        print("") 


      


    # printing lower part 


    for i in range(n - 1,0,-1):  


      


        for j in range(i,0,-1):  


            print(i,end="")         


        print("") 


  


# driver code 


n = 8


printPattern(n) 


  


# This code is contributed 


# by Anant Agarwal. 



















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C#














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// C# program to print the pyramid pattern 


using System; 


class GFG { 


      


// Print the pattern upto n 


static void printPattern(int n)  


{ 


    // Printing upper part 


    for (int i = 1; i <= n; i++) { 


    for (int j = 1; j <= i; j++) 


        Console.Write(i); 


        Console.WriteLine(); 


    } 


  


    // printing lower part 


    for (int i = n - 1; i > 0; i--) { 


    for (int j = i; j > 0; j--) 


        Console.Write(i); 


        Console.WriteLine(); 


    } 


} 


  


// Driver code 


public static void Main()  


{ 


    int n = 8; 


    printPattern(n); 


} 


} 


  


// This code is contributed by vt_m. 



















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PHP














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<?php 


// php program to print the 


// pyramid pattern 


  


// Print the pattern upto n 


function printPattern($n) 


{ 


    // Printing upper part 


    for ($i = 1; $i <= $n; $i++)  


    { 


        for ($j = 1; $j <= $i; $j++)  


            echo $i;      


        echo "\n"; 


    } 


  


    // printing lower part 


    for ($i = $n - 1; $i > 0; $i--)  


    { 


    for ($j = $i; $j > 0; $j--)  


            echo $i;      


        echo "\n"; 


    } 


} 


  


    // Driver Code 


    $n = 8; 


    printPattern($n); 


  


// This code is contributed by mits     


?> 



















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Output:


1
22
333
4444
55555
666666
7777777
88888888
7777777
666666
55555
4444
333
22
1



This article is contributed by Sahil Rajput. 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.


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