JavaScript Alphabet Pattern 30

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 95 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 30

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

example.html

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<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k;
for(i=65; i<=69; i++)
{
 for(j=i; j>65; j--)
  document.write(String.fromCharCode(j));
 for(k=65; k<=134-i; 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

ABCDE
BABCD
CBABC
DCBAB
EDCBA

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j, k;: Declares three variables i, j, and k to be used in the loops.
for(i=65; i<=69; i++): This is the outer loop that iterates from ASCII value 65 ('A') to 69 ('E'). It controls the number of lines to be generated.
Inside the outer loop:
1. for(j=i; j>65; j--): This nested loop generates characters in decreasing order starting from the value of i down to '66' (ASCII value of 'A'). It's responsible for the left side of the pattern.
2. document.write(String.fromCharCode(j));: Converts the ASCII value j to its corresponding character and prints it on the webpage.
3. for(k=65; k<=134-i; k++): This nested loop generates characters in increasing order starting from 'A' (ASCII value 65) up to the value of 134 - i. It's responsible for the right side of the pattern, which is longer as i increases.
4. document.write(String.fromCharCode(k));: Converts the ASCII value k to its corresponding character and prints it on the webpage.
5. document.write("<br>");: Adds a line break after each inner loop has finished, moving to the next line for the next iteration of the outer loop.
The outer loop continues until i reaches 69 ('E'), and the pattern is generated and displayed for each value of i.

💯 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!