Java Program to Print Hollow Right Angle Tringle Star Pattern

Program to Print Hollow Right Angle Tringle Star Pattern

In this article we are going to see how to print Hollow right angle Tringle star program.

Example-1

When row value=4
*
**
* *
****

Example-2:

When row value=5
*
**
* *
*   *
*****

Now, let’s see the actual program for printing it.

Don’t stop learning now. Get hold of all the important Java fundamentals with the Simple java program example guide and practice well.

Approach:

Enter total row and store it in an integer variable row.
Take first for loop to print all rows.
Take first inner for loop to print column values i.e., first inner for loop will print all the spaces in the column. With this print stars and spaces according to condition , i.e. if(c==1 ||c==r || r==row )
Then go on printing the star symbol according to loop.

JAVA Code:

Static Star Character
User Input Character

Method-1 : Static Star Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   // taking variable for loop iteration and row .
    int row,r,c,d;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    //outer for loop 
    for(r=1; r<=row ; r++)
    {
        //inner for loop
         for(c=1; c<=r; c++)
            if(c==1 ||c==r || r==row ) 
                System.out.print("*");
            else 
             System.out.print(" ");
        System.out.print("\n");//move to next line

    }
    }
}

Output :

Enter rows : 5
*
**
* *
*  *
*****

Method-2 : User Input Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   // taking variable for loop iteration and row .
    int row,r,c,d;
    char ran;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    // entering any random character
    System.out.print("Enter character : ");
    ran = s.next().charAt(0);
    //outer for loop 
    for(r=1; r<=row ; r++)
    {
        //inner for loop
         for(c=1; c<=r; c++)
            if(c==1 ||c==r || r==row ) 
                System.out.print(ran);
            else 
             System.out.print(" ");
        System.out.print("\n");//move to next line

    }
    }
}

Output :

Enter rows : 5
Enter character : @
@
@@
@    @
@       @  
@@@@@

C Code:

#include <stdio.h>
int main() {
   int r, row, c ,d;
   printf("Enter rows: ");
   scanf("%d", &row);
  for(r=1; r<=row ; r++)
    {
        //inner for loop
         for(c=1; c<=r; c++)
            if(c==1 ||c==r || r==row ) 
               printf("*");
            else 
             printf(" ");
        printf("\n");//move to next linne
    }
   return 0;
}

Output :

Enter rows : 5
*
**
* *
*  *
*****

C++ Code:

#include <iostream>
using namespace std;
int main()
{
   int row, r , c ,d ;
   cout << "Enter  rows: ";
   cin >> row;
  for(r=1; r<=row ; r++)
    {
        //inner for loop
         for(c=1; c<=r; c++)
            if(c==1 ||c==r || r==row ) 
               cout << "*" ;
            else 
             cout << " ";
        cout << "\n" ;//move to next line
    }
   return 0;
}

Output :

Enter rows : 5
*
**
* *
*  *
*****

Related Java Star Pattern Programs: