Java Star Pattern 1

Posted in Java Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 350 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

Java Star Pattern 1

Here`s a program that prints the above star pattern using Java Programming:

Demo.java

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public class Demo
{
 public static void main(String[] args)
 {
  int i, j;
  for(i=1; i<=5; i++)
  {
   for(j=1; j<=i; j++)
    System.out.print("*");
   System.out.println();
  }
 }
}

💻 Testing the Program

When you run the above program, it will print the following output:

Output

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

🧠 How the Program Works

Let's break down the logic behind the code:

public class Demo: This line defines a class named Demo. In Java, a program typically consists of one or more classes, and the public keyword indicates that this class is accessible from other classes.
public static void main(String[] args): This line defines the main method. The main method is the entry point of a Java program. It takes an array of strings (args) as its parameter, although it's not used in this program.
Inside the main method, two integer variables i and j are declared without initialization.
for(i=1; i<=5; i++): This is an outer for loop that runs from i equals 1 to i less than or equal to 5. It controls the number of rows in the pattern. The loop starts with i at 1, increments i by 1 in each iteration, and stops when i becomes greater than 5.
for(j=1; j<=i; j++): This is an inner for loop nested within the outer loop. It runs from j equals 1 to j less than or equal to i. The inner loop controls the number of asterisks to print on each row. For the first row, it prints 1 asterisk, for the second row 2 asterisks, and so on, up to i asterisks.
System.out.print("*"): Inside the inner loop, this line prints an asterisk without moving to the next line. It is used to print the asterisks on the same line.
After the inner loop completes, System.out.println() is called. This prints a newline character, moving to the next line. This is done to start a new row for the next iteration of the outer loop.
The outer loop continues to run until i is no longer less than or equal to 5, and the program finishes.

💯 Tips for Enhancement:

Explore the versatility of this pattern by adjusting its parameters. Whether you increase or decrease the size, tweak the spacing, or modify the characters used, each change opens up a world of possibilities, allowing you to customize and create your unique visual effects.

✔ Conclusion:

Creating visually appealing patterns is not only a fun endeavour but also a great way to enhance your programming or design skills. We hope this tutorial has inspired you to explore the world of creative coding. Share your creations with us, and let your imagination run wild!

🤗 Closing Call-to-Action:

We'd love to see your unique interpretations of the star pattern. Share your creations in the comments below, and don't hesitate to reach out if you have any questions or suggestions for future tutorials. Happy coding!