JavaScript Alphabet Pattern 18

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 141 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 18

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

example.html

Copied

<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k;
for(i=65; i<=69; i++)
{
 for(j=65; j<=i; j++)
  document.write(String.fromCharCode(j));
 for(k=i-1; k>=65; k--)
  document.write(String.fromCharCode(k));
 document.write("<br>");
}
</script>
</body>
</html>

💻 Testing the Program

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

Output

A
ABA
ABCBA
ABCDCBA
ABCDEDCBA

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j, k;: Declares three variables i, j, and k which will be used as loop counters.
for(i=65; i<=69; i++): This outer loop runs five times, with i ranging from 65 to 69. These values correspond to ASCII codes of capital letters from 'A' to 'E'.
for(j=65; j<=i; j++): This nested loop iterates from 65 (ASCII code of 'A') up to the current value of i. It prints characters by converting ASCII values to their respective characters using String.fromCharCode(j).
for(k=i-1; k>=65; k--): Another nested loop that starts with the value of i minus one and iterates down to 65 (ASCII code of 'A'). It prints characters in reverse order.
document.write("<br>");: After each inner loop pair (one increasing, one decreasing), a line break <br> is added to move to the next line.

💯 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 alphabet 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!