Java Program to Print Right Pascals Star Triangle

Write a Java program to print right pascals star triangle using for loop. 

package ShapePrograms2;

import java.util.Scanner;

public class RightPascal1 {
	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		int i, j;
		
		System.out.print("Enter Right Pascals Triangle Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Pascals Triangle Star Pattern");
		
		for (i = 0 ; i < rows; i++ ) 
		{
			for (j = 0 ; j <= i; j++ ) 
			{
				System.out.print("* ");
			}
			System.out.println();
		}
		
		for (i = rows - 1; i >= 0; i-- ) 
		{
			for (j = 0 ; j <= i - 1; j++ ) 
			{
				System.out.print("* ");
			}
			System.out.println();
		}
	}
}
Java Program to Print Right Pascals Star Triangle

This Java example displays the stars in the right pascals triangle pattern using a while loop.

package ShapePrograms2;

import java.util.Scanner;

public class RightPascal2 {
	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Right Pascals Triangle Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Pascals Triangle Star Pattern");
		int j, i = 0;
		
		while(i < rows ) 
		{
			j = 0 ;
			
			while( j <= i ) 
			{
				System.out.print("* ");
				j++;
			}
			System.out.println();
			i++;
		}
		
		i = rows - 1; 
		while (i >= 0) 
		{
			j = 0 ;
			while ( j <= i - 1 ) 
			{
				System.out.print("* ");
				j++;
			}
			System.out.println();
			i--;
		}
	}
}
Enter Right Pascals Triangle Pattern Rows = 8
Printing Right Pascals Triangle Star Pattern
* 
* * 
* * * 
* * * * 
* * * * * 
* * * * * * 
* * * * * * * 
* * * * * * * * 
* * * * * * * 
* * * * * * 
* * * * * 
* * * * 
* * * 
* * 
* 

Java program to print right pascals star triangle using do while loop.

package ShapePrograms2;

import java.util.Scanner;

public class RightPascal3 {
	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Right Pascals Triangle Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Pascals Triangle Star Pattern");
		int j, i = 0;
		
		do 
		{
			j = 0 ;
			
			do
			{
				System.out.print("* ");

			} while( ++j <= i );
			
			System.out.println();

		} while(++i < rows );
		
		i = rows - 1; 
		do
		{
			j = 0 ;
			do
			{
				System.out.print("* ");

			} while ( ++j <= i - 1 );
			
			System.out.println();

		} while (--i > 0);
	}
}
Enter Right Pascals Triangle Pattern Rows = 9
Printing Right Pascals Triangle Star Pattern
* 
* * 
* * * 
* * * * 
* * * * * 
* * * * * * 
* * * * * * * 
* * * * * * * * 
* * * * * * * * * 
* * * * * * * * 
* * * * * * * 
* * * * * * 
* * * * * 
* * * * 
* * * 
* * 
* 

In this Java example, the RightPascalTrianglePattern function prints a given symbol’s right pascal triangle pattern.

package ShapePrograms2;

import java.util.Scanner;

public class RightPascal4 {
	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Right Pascals Triangle Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.print("Enter Character for Right Pascals Triangle Pattern = ");
		char ch = sc.next().charAt(0);
		
		System.out.println("Printing Right Pascals Triangle Pattern");
		RightPascalTrianglePattern(rows, ch);	
	}
	
	public static void RightPascalTrianglePattern(int rows, char ch) {
		int i, j;
		
		for (i = 0 ; i < rows; i++ ) 
		{
			for (j = 0 ; j <= i; j++ ) 
			{
				System.out.print(ch + " ");
			}
			System.out.println();
		}
		
		for (i = rows - 1; i >= 0; i-- ) 
		{
			for (j = 0 ; j <= i - 1; j++ ) 
			{
				System.out.print(ch + " ");
			}
			System.out.println();
		}
	}
}
Enter Right Pascals Triangle Pattern Rows = 11
Enter Character for Right Pascals Triangle Pattern = #
Printing Right Pascals Triangle Pattern
# 
# # 
# # # 
# # # # 
# # # # # 
# # # # # # 
# # # # # # # 
# # # # # # # # 
# # # # # # # # # 
# # # # # # # # # # 
# # # # # # # # # # # 
# # # # # # # # # # 
# # # # # # # # # 
# # # # # # # # 
# # # # # # # 
# # # # # # 
# # # # # 
# # # # 
# # # 
# # 
# 

About Suresh

Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.