JavaScript Number Pattern 24

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 229 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 24

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

example.html

Copied

<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k = 1;
for(i=1; i<=5; i+=2)
{
 for(j=5; j>=1; j--)
 {
  if(j > i)
   document.write("&nbsp;&nbsp;");
  else
   document.write(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

    1  
  2 3 4  
5 6 7 8 9

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j, k = 1;: This line declares three variables i, j, and k, initializing k with the value 1. These variables will be used in the loops to control the iteration and output.
for(i=1; i<=5; i+=2): This is the outer loop. It starts with i set to 1, and it runs as long as i is less than or equal to 5. In each iteration, i is incremented by 2.
{: The opening curly brace marks the beginning of the outer loop's block of code.
for(j=5; j>=1; j--): This is the inner loop. It starts with j set to 5, and it runs as long as j is greater than or equal to 1. In each iteration, j is decremented by 1.
{: The opening curly brace marks the beginning of the inner loop's block of code.
if(j > i): This is a conditional statement that checks if the value of j is greater than the value of i.
document.write("  ");: If the condition in step 6 is true (i.e., j is greater than i), a non-breaking space HTML entity is written to the document using the document.write() method. This adds spaces to the output.
else: If the condition in step 6 is false (i.e., j is not greater than i), this part of the code is executed.
document.write(k++ +"  ");: In this case, the value of k is written to the document using document.write(), followed by a non-breaking space. After writing the value, k is incremented by 1 using the post-increment operator (k++).
}: The closing curly brace marks the end of the inner loop's block of code.
document.write("<br>");: After each iteration of the inner loop, a line break <br> is written to the document using document.write(). This moves the output to the next line.
}: The closing curly brace marks the end of the outer loop's block of code.

💯 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 number 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!