JavaScript Alphabet Pattern 19

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 101 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 19

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

💻 Testing the Program

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

Output

A        A
AB      BA
ABC    CBA
ABCD  DCBA
ABCDEEDCBA

🧠 How the Program Works

Let's break down the logic behind the code:

The program uses three variables: i, j, and k.
The outermost loop iterates over the values of i from 65 to 69. These correspond to the ASCII values of characters 'A' to 'E'.
Inside the outer loop, there are two nested loops (for loops using j and k), which are used to control the columns within each row.
The first nested loop (for(j=65; j<=69; j++)) prints characters from 'A' to 'E' in the first half of the row. If the value of j is less than or equal to the value of i, a <div> element containing the character represented by j is written. Otherwise, an empty <div> element is written.
The second nested loop (for(k=69; k>=65; k--)) prints characters from 'E' to 'A' in the second half of the row. If the value of k is greater than the value of i, an empty <div> element is written. Otherwise, a <div> element containing the character represented by k is written.
After completing both nested loops, a <br> element is written to move to the next line.
The outer loop continues this process for each value of i, resulting in a pattern of characters and empty spaces that creates a pyramid-like pattern.

💯 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!