JavaScript Number Pattern 50

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 238 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 50

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;
for(i=1; i<=5; i++)
{
 for(j=i; j>1; j--)
  document.write(j);
 for(k=1; k<=6-i; k++)
  document.write(k);
 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:

var i, j, k;: Declare three variables i, j, and k to be used in the loops.
for(i=1; i<=5; i++): The outer loop runs from i = 1 to i = 5. It controls the number of rows in the pattern.
1. for(j=i; j>1; j--): The first nested loop runs from j = i down to j = 2. It controls the decreasing sequence of numbers to be printed before the increasing sequence.
  - In the first iteration (i = 1), the loop doesn't run because j = 1 and the condition j > 1 is not satisfied.
  - In the second iteration (i = 2), the loop runs once (j = 2).
  - In the third iteration (i = 3), the loop runs twice (j = 3 and j = 2).
  - In the third iteration (i = 3), the loop runs twice (j = 3 and j = 2).
  The loop prints decreasing numbers within each row.
2. for(k=1; k<=6-i; k++): The second nested loop runs from k = 1 to k = 6 - i. It controls the increasing sequence of numbers to be printed after the decreasing sequence.
  - In the first iteration (i = 1), the loop runs five times (k = 1, k = 2, ..., k = 5).
  - In the second iteration (i = 2), the loop runs four times (k = 1, k = 2, ..., k = 4).
  - And so on.
3. document.write("<br>");: After both nested loops finish, a line break (<br>) is written to move to the next line.
The entire process repeats for each value of i (from 1 to 5), creating a pattern of decreasing and increasing numbers within each row.

💯 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!