Program to print pyramid pattern

Write to program to print the pyramid pattern formed of stars 

Example :

Input:  n = 6
Output:
       *
       * *
       * * *
       * * * *
       * * * * *
       * * * * * * 
       * * * * *
       * * * *
       * * *
       * * 
       *

We strongly recommend you to minimize your browser and try this yourself first.
The idea is to use two for loops for every part of the pyramid. The two parts may be classified as upper part and lower part 

C++

// C++ program to print Pyramid pattern
#include<iostream>
using namespace std;

void pattern(int n)
{
    // For printing the upper part of the pyramid
    for (int i = 1; i < n; i++){
        for (int j = 1; j < i+1; j++){
            cout <<" * ";
        }
        cout << endl ;
    }

    // For printing the lower part of pyramid
    for (int i = n; i > 0; i--){
        for (int j = i; j > 0; j--){
            cout <<  " * ";
        }
        cout << endl ;
    }
}

// Driver program
int main()
{
    pattern(6);
    return 0;
}

C

// C program to print the pyramid pattern
#include <stdio.h>

void pattern(int n)
{
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= i; j++) {
            printf("* ");
        }
        printf("\n");
    }

    // For printing the lower part of pyramid
    for (int i = n - 1; i >= 1; i--) {
        for (int j = 1; j <= i; j++) {
            printf("* ");
        }
        printf("\n");
    }
}

// Driver program
int main()
{
    pattern(6);
    return 0;
}

// This code is contributed by bhartik021

Java

// Java program to print Pyramid pattern
import java.io.*;

class GFG
{
    public static void pattern(int n)
    {
        // For printing the upper
        // part of the pyramid
        for (int i = 1; i < n; i++)
        {
            for (int j = 1; j < i+1; j++)
            {
                System.out.print(" * ");
            }
            System.out.println();
        }

        // For printing the lower
        // part of pyramid
        for (int i = n; i > 0; i--)
        {
            for (int j = i; j > 0; j--)
            {
                System.out.print(" * ");
            }
            System.out.println();
        }
    }

    // Driver program
    public static void main(String args[])
    {
        pattern(6);
    }
}

// This code is contributed by NIkita Tiwari.

Python3

# Python program to print Pyramid pattern

def pattern(n):

    # For printing the upper part of pyramid
    for i in range (1, n+1):
        for j in range (1, i+1):
            print (" *",end=" ")
        print()

    # for printing the middle and lower part of pyramid
    for i in range (n, 1, -1):
        for j in range (i, 1, -1):
            print (" *",end=" ")
        print()

# Driver program
pattern(6)

C#

// C# program to print Pyramid pattern
using System;

class GFG {
    public static void pattern(int n)
    {
        // For printing the upper
        // part of the pyramid
        for (int i = 1; i < n; i++) {
            for (int j = 1; j < i + 1; j++) {
                Console.Write(" * ");
            }
            Console.WriteLine();
        }

        // For printing the lower
        // part of pyramid
        for (int i = n; i > 0; i--) {
            for (int j = i; j > 0; j--) {
                Console.Write(" * ");
            }
            Console.WriteLine();
        }
    }

    // Driver program
    public static void Main()
    {
        pattern(6);
    }
}

// This code is contributed by vt_m.

PHP

<?php
// PHP implementation to print
// Pyramid pattern

function pattern($n)
{
    // For printing the upper part
    // of the pyramid
    for ($i = 1; $i < $n; $i++)
    {
        for ($j = 1; $j < $i+1; $j++)
        {
            echo " * ";
        }
        echo "\n" ;
    }

    // For printing the lower part
    // of pyramid
    for ($i = $n; $i > 0; $i--)
    {
        for ($j = $i; $j > 0; $j--)
        {
            echo " * ";
        }
        echo "\n" ;
    }
}

// Driver code
$n=6;
pattern($n);

// This code is contributed by mits
?>

Javascript

<script>

// JavaScript program to print Pyramid pattern
function pattern(n)
{

    // For printing the upper
    // part of the pyramid
    for(var i = 1; i < n; i++)
    {
        for(var j = 1; j < i + 1; j++)
        {
            document.write(" * ");
        }
        document.write("<br>");
    }

    // For printing the lower part of pyramid
    for(var i = n; i > 0; i--)
    {
        for(var j = i; j > 0; j--)
        {
            document.write(" * ");
        }
        document.write("<br>");
    }
}

// Driver code
pattern(6);

// This code is contributed by rdtank

</script>

Output :

 *
 *  *
 *  *  *
 *  *  *  *
 *  *  *  *  *
 *  *  *  *  *  *
 *  *  *  *  *
 *  *  *  *
 *  *  *
 *  *
 *

Time complexity: O(n²)

Auxiliary Space: O(1)
This article is contributed by Rahul Gupta. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above