JavaScript Number Pattern 13

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 346 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 13

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

example.html

Copied

<!DOCTYPE html>
<html>
<body>

<script>
var i, j;
for(i=5; i>=1; i--)
{
 if(i % 2 == 0) 
 {
  for(j=i; j>=1; j--)
   document.write(j);
 }
 else
 {
  for(j=1; j<=i; j++) 
   document.write(j);
 }
 document.write("<br>");
}
</script>
</body>
</html>

💻 Testing the Program

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

Output

🧠 How the Program Works

Let's break down the logic behind the code:

Declare two variables i and j to be used as loop counters.
Enter a for loop with the initialization i=5, the condition i>=1, and the decrement i--. This outer loop controls the number of rows in the pattern. It will run 5 times, decrementing i from 5 to 1.
Inside the outer loop, there's an if statement that checks whether i is even (i % 2 == 0). If i is even, enter the nested loop to print numbers in descending order.
Enter another for loop with initialization j=i, the condition j>=1, and the decrement j--. This inner loop prints the numbers in descending order from the value of i down to 1.
Inside the inner loop, use the document.write() method to print the value of j.
If i is not even (i.e., it's odd), execute the else block. Enter a for loop with initialization j=1, the condition j<=i, and the increment j++. This inner loop prints numbers in ascending order from 1 to the value of i.
Inside the second inner loop, again use the document.write() method to print the value of j.
After each row of numbers is printed, add a line break ("<br>") using the document.write() method to move to the next line.
The outer loop will continue running until i becomes less than 1, effectively creating a triangle pattern with varying lengths of rows.
Once all iterations are complete, the program finishes executing.

💯 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!