Tutorials

JavaScript Star Pattern 7

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 420 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Star Pattern 7

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

example.html

Copied

<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k;
for(i=1; i<=5; i++)
{
 for(j=5; j>=1; j--)
 {
  if(i == j)
   document.write("*");
  else
   document.write("&nbsp;&nbsp;");
 }
 for(k=2; k<=5; k++)
 {
  if(i == k)
   document.write("*");
  else
   document.write("&nbsp;&nbsp;");
 }
 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 line declares three variables i, j, and k that will be used as loop counters.
for(i=1; i<=5; i++): This is the outer loop. It iterates from 1 to 5 and controls the rows of the pattern.
Inside the outer loop, we have two nested loops:
1. for(j=5; j>=1; j--): This loop iterates from 5 to 1 in reverse order and controls the left side of each row.
  Inside this loop:
  - if(i == j): If the current value of i (row) is equal to the current value of j (column), it means we're at a diagonal position in the left half of the row, so an asterisk (*) is written to the document.
  - Else, if i is not equal to j, two non-breaking spaces ( ) are written to the document. This creates the space to the left of the diagonal.
2. for(k=2; k<=5; k++): This loop iterates from 2 to 5 and controls the right side of each row.
  Inside this loop:
  - if(i == k): If the current value of i (row) is equal to the current value of k (column), it means we're at a diagonal position in the right half of the row, so an asterisk (*) is written to the document.
  - Else, if i is not equal to k, two non-breaking spaces ( ) are written to the document. This creates the space to the right of the diagonal.
After both inner loops have executed, document.write("<br>"); is used to add a line break, moving to the next row in the pattern.
This process continues until the outer loop completes all its iterations, resulting in the diamond-like pattern being displayed on the webpage.

💯 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!