Program to Print Pyramid Pattern using numbers

Last Updated : 05 Aug, 2022

Given a number N denoting the number of rows. The task is to print the zigzag pattern with N rows as shown in the below examples.
Examples:

Input : 2 
Output :        1
            2       3

Input : 5
Output :                1
                    2       6
                3       7       10
            4       8       11      13
        5       9       12      14      15

Approach:
1. Use a for loop for printing the number of rows.
2. Use two for loops for printing space and pattern.
3. Calculate starting value for each row with variable t.
Below is the implementation of above approach:

C++

// C++ Program to print pyramid
// pattern using numbers
#include <iostream>
using namespace std;
// Function to print pyramid pattern
class gfg
{
 public :
 void printPattern(int n)
 {
    int t;

    // outer loop to print rows
    for (int i = 1; i <= n; i++) {

        // inner loop to print spaces
        for (int j = i; j < n; j++)
            printf("\t");

        // calculate initial value
        t = i;

        // inner loop to print pattern
        for (int k = 1; k <= i; k++) {
            printf("%d\t\t", t);
            t = t + n - k;
        }
        printf("\n");
    }
 }
};

// Driver code
int main()
{
    gfg g;
    int n = 6;
    g.printPattern(n);
    return 0;
}
//this code is contributed by Soumik

// C Program to print pyramid
// pattern using numbers
#include <stdio.h>

// Function to print pyramid pattern
void printPattern(int n)
{
    int t;

    // outer loop to print rows
    for (int i = 1; i <= n; i++) {

        // inner loop to print spaces
        for (int j = i; j < n; j++)
            printf("\t");

        // calculate initial value
        t = i;

        // inner loop to print pattern
        for (int k = 1; k <= i; k++) {
            printf("%d\t\t", t);
            t = t + n - k;
        }
        printf("\n");
    }
}

// Driver code
int main()
{
    int n = 6;
    printPattern(n);
    return 0;
}

Java

// Java Program to print pyramid
// pattern using numbers
class GFG
{
// Function to print pyramid pattern
static void printPattern(int n)
{
    int t;

    // outer loop to print rows
    for (int i = 1; i <= n; i++) 
    {

        // inner loop to print spaces
        for (int j = i; j < n; j++)
            System.out.print("\t");

        // calculate initial value
        t = i;

        // inner loop to print pattern
        for (int k = 1; k <= i; k++) 
        {
            System.out.print(t + "\t\t");
            t = t + n - k;
        }
        System.out.println();
    }
}

// Driver code
public static void main(String []args)
{
    int n = 6;
    printPattern(n);
}
}

// This code is contributed by iAyushRaj

Python3

# Python3 Program to print pyramid
# pattern using numbers

# Function to print pyramid pattern
def printPattern(n):
    
    # outer loop to print rows
    for i in range(1, n + 1):

        # inner loop to print spaces
        for j in range(i, n):
            print("\t", end = "")

        # calculate initial value
        t = i

        # inner loop to print pattern
        for k in range (1, i + 1):
            print(t, "\t", "\t", end = "")
            t = t + n - k
        
        print()
    
# Driver code
n = 6
printPattern(n)
    
# This code is contributed 
# by iAyushRaj

// C# Program to print pyramid
// pattern using numbers
using System;

class GFG
{
// Function to print pyramid pattern
static void printPattern(int n)
{
    int t;

    // outer loop to print rows
    for (int i = 1; i <= n; i++)
    {

        // inner loop to print spaces
        for (int j = i; j < n; j++)
            Console.Write("\t");

        // calculate initial value
        t = i;

        // inner loop to print pattern
        for (int k = 1; k <= i; k++) 
        {
            Console.Write(t + "\t\t");
            t = t + n - k;
        }
        Console.WriteLine();
    }
}

// Driver code
public static void Main()
{
    int n = 6;
    printPattern(n);
}
}

// This code is contributed by iAyushRaj

PHP

<?php
// PHP Program to print pyramid
// pattern using numbers

// Function to print pyramid pattern
function printPattern($n)
{
    
    // outer loop to print rows
    for ($i = 1; $i <= $n; $i++)
    {

        // inner loop to print spaces
        for ($j = $i; $j < $n; $j++)
            echo "\t";

        // calculate initial value
        $t = $i;

        // inner loop to print pattern
        for ($k = 1; $k <= $i; $k++) 
        {
            echo "$t \t\t";
            $t = $t + $n - $k;
        }
        echo "\n";
    }
}
    
// Driver code
$n = 6;
printPattern($n);
    
// This code is contributed
// by iAyushRaj
?>

JavaScript

<script>

      // JavaScript Program to print pyramid
      // pattern using numbers

      // Function to print pyramid pattern

      function printPattern(n) {
        var t;

        // outer loop to print rows
        for (var i = 1; i <= n; i++) {
          // inner loop to print spaces
          for (var j = i; j < n; j++) 
          document.write("&emsp;&emsp;");

          // calculate initial value
          t = i;

          // inner loop to print pattern
          for (var k = 1; k <= i; k++) {
            document.write(t + "&emsp;&emsp;&emsp;");
            t = t + n - k;
          }
          document.write("<br>");
        }
      }

      // Driver code
      var n = 6;
      printPattern(n);
      
    </script>

Output:

                     1        
                2        7        
            3        8        12        
        4        9        13        16        
    5        10        14        17        19        
6        11        15        18        20        21

Time complexity: O(n²) for given input n

Auxiliary Space: O(1)

Program to Print Pyramid Pattern using numbers

Kasthuri Palanichamy

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Program to Print Pyramid Pattern using numbers

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