JavaScript Alphabet Pattern 15

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 91 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 15

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

example.html

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<!DOCTYPE html>
<html> 
 <head>
  <style>
   div{
    display: inline-block;
    text-align: center;
    width: 13px;
   }
  </style>
 </head>
<body>

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

💻 Testing the Program

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

Output

ABCDEEDCBA
ABCD**DCBA
ABC****CBA
AB******BA
A********A

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j;: This declares two variables, i and j, without initializing them yet.
var k = 65;: This initializes the variable k with the value 65.
for(i=69; i>=65; i--): This initiates a for loop with the loop variable i starting at 69 and decreasing by 1 in each iteration until it becomes 65 (inclusive). This loop controls the rows of the pattern.
Inside the outer loop:
1. for(j=65; j<=i; j++): This initiates an inner loop with the loop variable j starting at 65 and increasing until it reaches the value of i. This loop prints characters from 'A' (Unicode 65) to the current value of i in the pattern.
2. for(k=i; k<69; k++): This initiates another inner loop with the loop variable k starting at the current value of i and increasing until it reaches 68 (inclusive). This loop prints two '' div elements for each value of k, creating a block of '' characters in the pattern.
3. for(m=i; m>=65; m--): This initiates yet another inner loop with the loop variable m starting at the current value of i and decreasing until it reaches 65 (inclusive). This loop prints characters from the current value of i down to 'A' in the pattern.
4. document.write("<br>");: This writes a line break <br> to create a new line after each row of the pattern.
The loops and print statements inside the outer loop create the desired pattern of characters and '*' blocks in each row.
The outer loop continues to iterate until i becomes 65 (inclusive), generating rows of the pattern from 'E' to 'A'.
The final result is a pattern of characters and '*' blocks printed in a descending sequence with line breaks between rows.

💯 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!