JavaScript Alphabet Pattern 16

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 72 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Alphabet Pattern 16

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+=2)
{
 for(j=69; j>=65; j--)
 {
  if(j > i)
   document.write("&nbsp;&nbsp;");
  else
   document.write(String.fromCharCode(k++)+"&nbsp;&nbsp;");
 }
 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

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j;: Declare two variables i and j to be used in loops.
var k = 65;: Initialize variable k with the ASCII code for the character 'A'.
for(i=65; i<=69; i+=2): This is the outer loop. It starts with i set to 65 (ASCII for 'A') and continues as long as i is less than or equal to 69. It increments i by 2 in each iteration. This loop controls the rows of the pattern and skips every second row.
for(j=69; j>=65; j--): This is the inner loop. It starts with j set to 69 and continues as long as j is greater than or equal to 65. It decrements j by 1 in each iteration. This loop controls the columns of the pattern.
Inside the inner loop, there is an if statement that checks whether j is greater than i. If it is, spaces are written to the document (  ) to create the triangular shape. If not, it writes a character to the document using String.fromCharCode(k++) (which converts the ASCII code to its corresponding character) and increments k.
After the inner loop, the program writes a line break (<br>) to move to the next row of the 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!