JavaScript Number Pattern 23

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 293 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 23

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, m;
for(i=5; i>=1; i--)
{
 for(j=1; j<=i; j++)
  document.write(j);
 for(k=i; k<5; k++)
  document.write("**");
 for(m=i; m>=1; m--)
  document.write(m);
 document.write("<br>");
}
</script>
</body>
</html>

💻 Testing the Program

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

Output

1234554321
1234**4321
123****321
12******21
1********1

🧠 How the Program Works

Let's break down the logic behind the code:

Variable Declaration: The program declares four variables - i, j, k, and m - which will be used in the loops to control the pattern generation.
Outer Loop (i Loop): The outer loop iterates from i = 5 down to i = 1. This loop controls the number of rows in the pattern.
First Inner Loop (j Loop): Within the outer loop, there's a nested loop that runs from j = 1 to j = i. This loop prints numbers from 1 to the current value of i on the same row. So, for example, in the first iteration, it prints 1, in the second iteration it prints 12, in the third iteration it prints 123, and so on.
Second Inner Loop (k Loop): After the j loop, there's another nested loop that runs from k = i to k < 5. This loop prints two asterisks (**) for each remaining value of k until k reaches 4. This adds a constant number of asterisks to the pattern.
hird Inner Loop (m Loop): Next, there's another nested loop that runs from m = i down to m = 1. This loop prints the numbers in reverse order from the current value of i down to 1. So, for example, if i = 5, it prints 54321, if i = 4, it prints 4321, and so on.
Print Newline (<br>): After all the inner loops have executed, the program prints a <br> tag to move to the next line, creating the effect of a new row in the pattern.
Repeat Steps 3-6: The above steps are repeated for each iteration of the outer loop. This generates multiple rows of numbers and asterisks, creating the desired pattern.

💯 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!