Java Program to Print Downward Triangle with Increasing Order Number Pattern

Print Downward Triangle with Increasing Order Number Pattern

In the previous article, we have discussed Java Program to Print Triangle with Increasing Order Repeated Number Pattern

In this article we are going to see how to print the downward triangle with increasing order  number pattern.

Example-1

When rows value = 5

1 2 3 4 5
 1 2 3 4
  1 2 3
   1 2
    1
Example-2:

When rows value=7

1 2 3 4 5 6 7
 1 2 3 4 5 6
  1 2 3 4 5
   1 2 3 4
    1 2 3
     1 2
      1

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

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Approach:

  • Enter total number of rows and store it in an integer variable rows
  • Take one outer for loop to iterate the rows.
  • Take two inner for loops, one to print the space and the other to print number.
  • After each iteration print a new line.

Java Code to Print Downward Triangle with Increasing Order Number Pattern

import java.util.Scanner;
class Main
{
public static void main(String[] args)
{
    //Create a new Scanner object
    Scanner scan = new Scanner(System.in);

    //Taking total number of rows as input from user
    System.out.print("Rows : ");
    int rows= scan.nextInt();

   //Row and column are the iterators
    int numberOfRows, numberOfColumns;

   //Outer loop to iterate the rows
   //Iterates from 1 to the number of rows entered by the user
    for (numberOfRows = 1; numberOfRows <= rows; numberOfRows++)
    {
    //Inner loop to print space
    for (numberOfColumns = 1; numberOfColumns < numberOfRows; numberOfColumns++)
    {
        System.out.print(" ");
    }
    //Inner loop to print number
    for (numberOfColumns = 1; numberOfColumns <= rows - numberOfRows + 1; numberOfColumns++)
    {
        System.out.print(numberOfColumns+" ");
    }
    //Prints a newline
    System.out.println();
    }
}
}

Output:

Rows : 7

1 2 3 4 5 6 7
 1 2 3 4 5 6
  1 2 3 4 5
   1 2 3 4
    1 2 3
     1 2
      1

C Code to Print Downward Triangle with Increasing Order Number Pattern

#include <stdio.h>

int main()
{
   //Taking total number of rows as input from user
   printf("Rows : ");
   int rows;
   scanf("%d", &rows);

   //Row and column are the iterators
   int numberOfRows, numberOfColumns;

   //Outer loop to iterate the rows
   //Iterates from 1 to the number of rows entered by the user
   for (numberOfRows = 1; numberOfRows <= rows; numberOfRows++)
   {
      //Inner loop to print space
      for (numberOfColumns = 1; numberOfColumns < numberOfRows; numberOfColumns++)
      {
         printf(" ");
      }
      //Inner loop to print number
      for (numberOfColumns = 1; numberOfColumns <= rows - numberOfRows + 1; numberOfColumns++)
      {
         printf("%d ", numberOfColumns);
      }
      //Prints a newline
      printf("\n");
   }
   return 0;
}
Output:

Rows : 7

1 2 3 4 5 6 7
 1 2 3 4 5 6
  1 2 3 4 5
   1 2 3 4
    1 2 3
     1 2
      1

C++ Code to Print Downward Triangle with Increasing Order Number Pattern

#include <iostream>
using namespace std;
int main(int argc, char const *argv[])
{
    //Taking total number of rows as input from user
    cout << "Rows : ";
    int rows;
    cin >> rows;

    //Row and column are the iterators
    int numberOfRows, numberOfColumns;

    //Outer loop to iterate the rows
    //Iterates from 1 to the number of rows entered by the user
    for (numberOfRows = 1; numberOfRows <= rows; numberOfRows++)
    {
        //Inner loop to print space
        for (numberOfColumns = 1; numberOfColumns < numberOfRows; numberOfColumns++)
        {
            cout << " ";
        }
        //Inner loop to print number
        for (numberOfColumns = 1; numberOfColumns <= rows - numberOfRows + 1; numberOfColumns++)
        {
            cout << numberOfColumns << " ";
        }
        //Prints a newline
        cout << endl;
    }
    return 0;
}

Output:

Rows : 7

1 2 3 4 5 6 7
 1 2 3 4 5 6
  1 2 3 4 5
   1 2 3 4
    1 2 3
     1 2
      1

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