Tutorials

JavaScript Star Pattern 5

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 720 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Star Pattern 5

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

example.html

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<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k;
for(i=1; i<=5; i++)
{
 for(j=i; j<5; j++)
  document.write("&nbsp;&nbsp;");
 for(k=1; k<i*2; k++)
  document.write("*");
 document.write("<br>");
}
</script>
</body>
</html>

💻 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:

var i, j, k;: This declares three variables: i, j, and k, which will be used as loop counters.
for(i=1; i<=5; i++): This is the outer loop, which runs from i = 1 to i = 5, incrementing i by 1 each time. This loop controls the number of rows in the triangular pattern.
{: The opening curly brace marks the beginning of the outer loop's block of code.
for(j=i; j<5; j++): This is the inner loop responsible for printing spaces before the asterisks. It runs from j = i to j < 5, incrementing j by 1 each time. The purpose of this loop is to create the left indentation for each row, pushing the asterisks to the right based on the current row number.
document.write("  ");: This line inside the inner loop writes two non-breaking space entities. These spaces create the indentation effect before the asterisks.
for(k=1; k<i*2; k++): This is the inner loop responsible for printing asterisks. It runs from k = 1 to k < i*2, where i*2 determines the number of asterisks to be printed on each row based on the current row number.
document.write("*");: This line inside the second inner loop writes an asterisk for each iteration of the loop.
document.write("<br>");: After both inner loops finish running, this line writes a <br> element to move to the next line, effectively creating a new row in the triangular pattern.
}: The closing curly brace marks the end of the outer loop's block of code.

💯 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!