Java Program to Print Flag Star Pattern

Program to Print Flag Star Pattern

In this article we are going to see how to print the flag star pattern

Example-1

When rows value = 7
*
* *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *
*
* *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *
*
*
*
*
*
*
*

Example-2

When rows value = 5
*
* *
* * *
* * * *
* * * * *
*
* *
* * *
* * * *
* * * * *
*
*
*
*
*

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

Guys who are serious about learning the concepts of the java programming language should practice this list of programs in java and get a good grip on it for better results in exams or interviews.

Approach:

Enter the number of rows to print and store it in an integer variable rows.
Take an outer for loop to print the triangle twice.
Take inner for loop to print the triangle.
Finally take a for loop to print the pole of the flag.

JAVA Code:

Static Star Character
User Input Character

Method-1 : Static Star Character

import java.util.Scanner;
class Main
{
    public static void main(String[] args)  
    {  
        Scanner scan = new Scanner(System.in);
        System.out.print("Rows : ");
        //Taking total rows as input from user
        int r, c, rows = scan.nextInt();

        //Outer loop to print the top triangle two times
        for(int p = 0;p<2;p++)
        {
            //Inner loop that prints the triangle
            for(r = 0; r<rows;r++)
            {
                for(c = 0; c<=r;c++)
                    System.out.print("* ");
            //Prints a new line
            System.out.println();
            }
        }   
        
        for(r = 0; r<rows;r++)
        //Another loop to print the pole of the flag
            System.out.println("*");
    }

}

Output-

Rows : 5
*
* *
* * *
* * * *
* * * * *
*
* *
* * *
* * * *
* * * * *
*
*
*
*
*

Method-2 : User Input Character

import java.util.Scanner;
class Main
{
    public static void main(String[] args)  
    {  
        int r, c, rows;
        char k;
        Scanner scan = new Scanner(System.in);
        
        //Taking total rows as input from user
        System.out.print("Rows : ");
        rows = scan.nextInt();
        
        //Taking any random character as input from user
        System.out.print("Character : ");
        k = scan.next().charAt(0);


        //Outer loop to print the top triangle two times
        for(int p = 0;p<2;p++)
        {
            //Inner loop that prints the triangle
            for(r = 0; r<rows;r++)
            {
                for(c = 0; c<=r;c++)
                    System.out.print(k+" ");
            //Prints a new line
            System.out.println();
            }
        }   
        
        for(r = 0; r<rows;r++)
        //Another loop to print the pole of the flag
            System.out.println(k);
    }

}

Output-

Rows : 5
Character : 0
0
0 0
0 0 0
0 0 0 0
0 0 0 0 0
0
0 0
0 0 0
0 0 0 0
0 0 0 0 0
0
0
0
0
0

C Code:

#include <stdio.h>
int main(int argc, char const *argv[])
{
    printf("Rows : ");
    //Taking rows as input from user
    int rows, r, c;
    scanf("%d", &rows);

    for (int p = 0; p < 2; p++)
    { //Outer loop to print the top triangle two times
        for (r = 0; r < rows; r++)
        {
            //Inner loop that prints the triangle
            for (c = 0; c <= r; c++)
                printf("* ");
            //Prints a new line
            printf("\n");
        }
    }

    for (r = 0; r < rows; r++)
        //Another loop to print the pole of the flag
        printf("*\n");
    return 0;
}

Output-

Rows : 5
*
* *
* * *
* * * *
* * * * *
*
* *
* * *
* * * *
* * * * *
*
*
*
*
*

C++ Code:

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

    for (int p = 0; p < 2; p++)
    { //Outer loop to print the top triangle two times
        for (r = 0; r < rows; r++)
        {
            //Inner loop that prints the triangle
            for (c = 0; c <= r; c++)
                cout << "* ";
            //Prints a new line
            cout << endl;
        }
    }

    for (r = 0; r < rows; r++)
        //Another loop to print the pole of the flag
        cout << "* " << endl;
    return 0;
}

Output-

Rows : 5
*
* *
* * *
* * * *
* * * * *
*
* *
* * *
* * * *
* * * * *
*
*
*
*
*

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