JavaScript Number Pattern 47

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 217 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 47

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

example.html

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<!DOCTYPE html>
<html>
<body>

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

💻 Testing the Program

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

Output

5 5 5 5 5 5 5 5 5 
5 4 4 4 4 4 4 4 5 
5 4 3 3 3 3 3 4 5 
5 4 3 2 2 2 3 4 5 
5 4 3 2 1 2 3 4 5 
5 4 3 2 2 2 3 4 5 
5 4 3 3 3 3 3 4 5 
5 4 4 4 4 4 4 4 5 
5 5 5 5 5 5 5 5 5

🧠 How the Program Works

Let's break down the logic behind the code:

Initialize variables:
- i, j, and k are declared and initialized to 5.
First Part:
The program enters a nested loop structure to generate the first part of the pattern. This part of the pattern forms the upper half of the output.
1. The outer loop (for(i=k; i>=1; i--)) runs from k down to 1.
2. The first nested loop (for(j=k; j>=1; j--)) runs from k down to 1.
  - If j is greater than i, it prints the value of j followed by a space.
  - Otherwise, it prints the value of i followed by a space.
3. The second nested loop (for(j=2; j<=k; j++)) runs from 2 to k.
  - If j is greater than i, it prints the value of j followed by a space.
  - Otherwise, it prints the value of i followed by a space.
4. After each row of numbers is printed, a line break (<br>) is added to move to the next line.
Second Part:
This part of the pattern forms the lower half of the output. It follows a similar structure to the first part, but the values of i in the outer loop start from 2 and go up to k.
1. The outer loop (for(i=2; i<=k; i++)) runs from 2 up to k.
2. The first and second nested loops operate in the same way as described in the first part.
3. After each row of numbers is printed, a line break (<br>) is added to move to the next line.
The entire pattern is generated and printed within the HTML document using the document.write() method.

💯 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!