Java Program:

- To print sideway triangle pattern using *

Example:

User Input: 3

Output:

*
* *
* * *
* *
*
import java.util.Scanner;

public class Pattern {

  public static void main(String[] args) {
    Scanner userInput = new Scanner(System.in);
    System.out.print("Enter number of columns : ");

    int columns,trows,k;
    columns=userInput.nextInt();
    trows=2*columns-1;
    k=1;
    for(int i=1; i<=trows; i++) {
      for(int j=1; j<=k; j++) {
        System.out.print("* ");
      }
      if(i<columns)k++;
      else k--;
      System.out.print("\n");
    }

  }
}

Output:

Enter number of columns: 4

*
* *
* * *
* * * *
* * *
* *
*
Program
pattern

Main Logic :

trows=2*columns-1;   // trows : total rows to print
k=1;  // Used to trigger decreasing order of *

for(int i=1; i<=trows; i++) {
  for(int j=1; j<=k; j++) {
    System.out.print("* ");
  }
  //check for position change at which triangle * value to decrease
  if(i<columns)k++;
  else k--;

  System.out.print("\n");
}

You can print any thing in this pattern, just replace your value with *

Concept

Coming Soon !

Quick
Tutorial

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