JavaScript Number Pattern 54

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 209 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 54

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;
// First Part
for(i=1; i<=5; i++)
{
 for(j=1; j<=5; j++)
 {
  if(i == j)
   document.write(j);
  else
   document.write("&nbsp;&nbsp;");
 }
 for(k=4; k>=1; k--)
 {
  if(i == k)
   document.write(k);
  else
   document.write("&nbsp;&nbsp;");
 }
 document.write("<br>");
}
// Second Part
for(i=4; i>=1; i--)
{
 for(j=1; j<=5; j++)
 {
  if(i == j)
   document.write(j);
  else
   document.write("&nbsp;&nbsp;");
 }
 for(k=4; k>=1; k--)
 {
  if(i == k)
   document.write(k);
  else
   document.write("&nbsp;&nbsp;");
 }
 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:

Variable Declarations: Three variables i, j, and k are declared to be used as loop counters.
First Part Loop (Top Half): This loop generates the top half of the pattern.
1. The outer loop (for(i=1; i<=5; i++)) runs five times for i values from 1 to 5, representing the rows of the pattern.
2. The first inner loop (for(j=1; j<=5; j++)) generates the first part of each row. It runs for j values from 1 to 5.
  - If i is equal to j, it prints the value of j (a number) using document.write(j).
  - Otherwise, it prints two non-breaking space characters (  ), which creates a gap.
3. The second inner loop (for(k=4; k>=1; k--)) generates the second part of each row, which is the mirror image of the first part but in reverse. It runs for k values from 4 to 1.
  - If i is equal to k, it prints the value of k.
  - Otherwise, it prints two non-breaking space characters.
4. After both inner loops, a line break <br> is added to move to the next row.
Second Part Loop (Bottom Half): This loop generates the bottom half of the pattern, which is similar to the first part but mirrored vertically.
1. The outer loop (for(i=4; i>=1; i--)) runs four times for i values from 4 to 1, representing the rows of the bottom half.
2. The first inner loop (for(j=1; j<=5; j++)) generates the first part of each row, just like in the first part.
3. The second inner loop (for(k=4; k>=1; k--)) generates the second part of each row, similar to the first part.
4. Again, a line break <br> is added after the loops to move to the next row.
Output: The program uses document.write() to output the pattern to the web page.

💯 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!