Program to print Hollow right triangle star pattern in Java

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Program to print Hollow right triangle star pattern in Java

In this article, we will discuss the Program to print hollow right triangle star pattern in Java

We can display many types of number, star, Alphabet, Binary patterns using for.while and do-while loop in Java language

In this post, we are going to learn how to print a Hollow right triangle star pattern using for, while and do-while loop in Java language,

Program to print Hollow right triangle star pattern

Code to display Hollow right triangle star using for loop

This program allows the user to enter the number of rows and with symbols then the program displays the hollow right triangle star pattern using for loop in Java language

Program 1

//program to print right triangle star pattern
import java.util.Scanner;
public class HollowRightTrianleStar{//class
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
  //create a scanner object for input
  
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter symbol as you wish: "); 
char ch=scan.next().charAt(0);
//read Sympol input from user
System.out.print("\n");
for(int i=1; i<=rows; i++){//outer for loop 
   for(int j=1; j<=i; j++){//inner for loop
   //print i number of star 
     if(j==1 || j==i || i==rows){
       System.out.print(ch);
     }
     else{
       System.out.print(" ");
}
 
}
System.out.print("\n");//move to next line

}
}
}

When the above code is executed, it produces the following result

Code to display Hollow right triangle star using while loop

This program allows the user to enter the number of rows and with symbols then the program displays the hollow right triangle star pattern using while loop in Java language

Program 2

//program to print right triangle star pattern
import java.util.Scanner;
public class HollowRightTrianleStar1{//class
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
  //create a scanner object for input
  
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter symbol as you wish: "); 
char ch=scan.next().charAt(0);
//read Sympol input from user
System.out.print("\n");
int i=1;
while(i<=rows){//outer for loop 
int j=1;
   while(j<=i){//inner for loop
   //print i number of star 
     if(j==1 || j==i || i==rows){
       System.out.print(ch);
     }
     else{
       System.out.print(" ");
}
  j++;
}
System.out.print("\n");//move to next line
 i++;

}
}
}

When the above code is executed, it produces the following result

Code to display Hollow right triangle star using do-while loop

This program allows the user to enter the number of rows and with symbols then the program displays the Hollow right triangle star pattern using te do-wile loop in Java language

Program 3

//program to print right triangle star pattern
import java.util.Scanner;
public class HollowRightTrianleStar2{//class
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
  //create a scanner object for input
  
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter symbol as you wish: "); 
char ch=scan.next().charAt(0);
//read Sympol input from user
System.out.print("\n");
int i=1;
do{//outer for loop 
int j=1;
  do{//inner for loop
   //print i number of star 
     if(j==1 || j==i || i==rows){
       System.out.print(ch);
     }
     else{
       System.out.print(" ");
}
  j++;
} while(j<=i);
System.out.print("\n");//move to next line
 i++;

}while(i<=rows);
}
}

When the above code is executed, it produces the following result