Java Program to Print Alphabet S Star Pattern

Program to Print Alphabet S Star Pattern

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

Example-1

For rows = 10

**********
*
*
*
*
**********
              *
              *
              *
**********

Example-2

For rows = 5

*****
*
*****
      *
*****

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

Want to excel in java coding? Practice with these Java Programs examples with output and write any kind of easy or difficult programs in the java language

Approach:

Enter total row and store it in an integer variable rows.
Take one outer for loop to iterate the rows and one inner loop to iterate the columns.
Print stars where conditions matches else continue.

JAVA Code:

Static Star Character
User Input Character

Method-1: Static Star Character

import java.util.Scanner;
class pattern
{
  public static void main(String[] args) 
  {
    Scanner scan = new Scanner(System.in);
    System.out.print("Rows : ");
    //Taking size as input from user
    int rows = scan.nextInt();
    int r, c;
    for (r = 0; r < rows; r++)
    { //Outer Loop
      for (c = 0; c < rows; c++) {
      if((r==0||r==rows/2||r==rows-1))
        System.out.print("*");
      else if(r<rows/2 && c== 0)
        System.out.print("*");
      else if(r>rows/2 && c==rows-1)
        System.out.print("*");
      else
        System.out.print(" ");
    }
      System.out.println();
        //Prints a newline
    }
  }
}

Output:

Rows : 5

*****
*
*****
      *
*****

Method-2: User Input Character

import java.util.Scanner;
class Main
{
  public static void main(String[] args) 
  {
    Scanner scan = new Scanner(System.in);
     //Taking size as input from user
    System.out.print("Rows : ");
    int rows = scan.nextInt();
    
    //Taking random character as input from user
    System.out.print("Character : ");
    char s = scan.next().charAt(0);
    
    for (int r = 0; r < rows; r++)
    { //Outer Loop
      for (int c = 0; c < rows; c++) {
      if((r==0||r==rows/2||r==rows-1))
        System.out.print(s);
      else if(r<rows/2 && c== 0)
        System.out.print(s);
      else if(r>rows/2 && c==rows-1)
        System.out.print(s);
      else
        System.out.print(" ");
    }
      System.out.println();
        //Prints a newline
    }
  }
}

Output

Rows : 5
Character : s

sssss
s
sssss
      s
sssss

Explanation :

Let’s understand the program by going through the detailed explanation.

We have taken rows value as 5.

Iteration-1
r=0, goes into the inner loop prints five stars for r==0.

*****

Iteration-2
r=1, goes into the inner loop prints one star as r < rows / 2 && c == 0.

Iteration-3
r=2, goes into the inner loop prints five stars as r == rows / 2.

******

Iteration-4

r=3, goes into the inner loop prints one star as r > rows / 2 && c == rows - 1.

Iteration-5

r=4, goes into the inner loop prints five star as r == rows - 1.

******

After this r equals rows- i.e. 5 so program will come out of the loop.

Now, after end of all iteration we will see the complete pattern is printed on the output screen like this.

*****
*
*****
      *
*****

C Code:

#include <stdio.h>
int main(int argc, char const *argv[])
{
    int rows;
    printf("Rows : ");
    scanf("%d", &rows);
    //Taking rows as input from user
    int r, c;
    for (r = 0; r < rows; r++)
    { //Outer Loop
        for (c = 0; c < rows; c++)
        {
            if ((r == 0 || r == rows / 2 || r == rows - 1))
                printf("*");
            else if (r < rows / 2 && c == 0)
                printf("*");
            else if (r > rows / 2 && c == rows - 1)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
        //Prints a newline
    }
    return 0;
}

Output:

Rows : 5

*****
*
*****
      * 
*****

C++ Code:

#include <iostream>
using namespace std;
int main(int argc, char const *argv[])
{
    int rows;
    cout << "Rows : ";
    cin >> rows;
    //Taking rows as input from user
    int r, c;
    for (r = 0; r < rows; r++)
    { //Outer Loop
        for (c = 0; c < rows; c++)
        {
            if ((r == 0 || r == rows / 2 || r == rows - 1))
                cout << "*";
            else if (r < rows / 2 && c == 0)
                cout << "*";
            else if (r > rows / 2 && c == rows - 1)
                cout << "*";
            else
                cout << " ";
        }
        cout << endl;
        //Prints a newline
    }
    return 0;
}

Output:

Rows : 5

*****
*
*****
      *
*****

Related Java Star Pattern Programs: