JavaScript Alphabet Pattern 25

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 84 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 25

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

example.html

Copied

<!DOCTYPE html>
<html>
<body>

<script>
var i, j;
var k = 65;
for(i=65; i<=69; i++)
{
 for(j=69; j>=i; j--)
  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 B C D E
F G H I
J K L
M N
O

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j;: This declares two variables i and j to be used as loop counters.
var k = 65;: Initializes a variable k with the ASCII value of the character 'A'. In ASCII, 'A' has the value 65.
for(i=65; i<=69; i++): This is an outer loop that runs from i being initialized with 65 (ASCII value of 'A') up to 69 (ASCII value of 'E') inclusive.
Inside the outer loop, there's an inner loop: for(j=69; j>=i; j--). This inner loop runs from j initialized with 69 down to the value of i. This creates a decreasing sequence of values from 69 down to the value of i.
document.write(String.fromCharCode(k++) + " ");: Within the inner loop, this line is responsible for writing characters to the document. String.fromCharCode(k++) converts the current value of k to its corresponding character. For example, if k is 65, it will be converted to 'A'. The k++ increments k after each use. The character is followed by a space, and the result is written to the document using document.write().
After the inner loop completes, document.write("<br>"); is used to write a line break (<br>) to the document, moving the output to the next line.
The inner loop continues to execute for each value of i, generating the pattern of characters in decreasing order within each line, and moving to a new line after each inner loop completes.
The outer loop increments i and repeats the above process until i reaches 69 (ASCII value of 'E'), completing the pattern generation.

💯 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!