JavaScript Alphabet Pattern 23

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 138 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 23

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: 18px;
   }
  </style>
 </head>
<body>

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

💻 Testing the Program

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

Output

        E
      E D
    E D C
  E D C B
E D C B A

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j;: This declares two variables i and j using the var,/ keyword. These variables will be used in the loops.
for(i=69; i>=65; i--): This is the outer loop. It starts with i initialized to 69 and iterates as long as i is greater than or equal to 65. In each iteration, i is decremented by 1.
Inside the outer loop, there are two nested loops:
1. for(j=65; j<i; j++): This is the first nested loop. It starts with j initialized to 65 and iterates as long as j is less than the current value of i. In each iteration, it writes an empty <div></div> element using the document.write function.
2. for(j=69; j>=i; j--): This is the second nested loop. It starts with j initialized to 69 and iterates as long as j is greater than or equal to the current value of i. In each iteration, it writes a <div> element containing the character represented by the ASCII value of j using String.fromCharCode(j).
document.write("<br>");: After the two nested loops are executed for a particular value of i, this line writes a <br> element to create a line break in the output.
The outer loop continues to iterate until the condition i >= 65 becomes false.

💯 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!