JavaScript Number Pattern 21

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 367 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Number Pattern 21

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

example.html

Copied

<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k, m;
for(i=1; i<=5; i++)
{
 document.write(i +" ");
 m = 4;
 k = i + m;
 for(j=1; j<i; j++)
 {
  document.write(k +" ");
  m--;
  k = k + m;
 }
 document.write("<br>");
}
</script>
</body>
</html>

💻 Testing the Program

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

Output

1 
2 6 
3 7 10 
4 8 11 13 
5 9 12 14 15

🧠 How the Program Works

Let's break down the logic behind the code:

var i, j, k, m;: This declares four variables i, j, k, and m to be used in the program. These variables will be used in the loop to control the flow of execution and store intermediate values.
for(i=1; i<=5; i++): This is the outer loop that runs from i = 1 to i = 5, incrementing i by 1 in each iteration. This loop controls the number of lines of output that will be generated.
Inside the outer loop:
1. document.write(i +" ");: This writes the value of i followed by a space to the HTML document. This is responsible for printing the current line number.
2. m = 4;: Sets the value of m to 4. m will be used as a decrementing value in the inner loop.
3. k = i + m;: Calculates the initial value of k as the sum of i and m.
Inner loop for(j=1; j<i; j++): This loop runs from j = 1 to j less than the current value of i. It controls the number of values printed within each line of the output.
Inside the inner loop:
1. document.write(k +" ");: Writes the value of k followed by a space to the HTML document. This prints the numbers within each line.
2. m--;: Decrements the value of m by 1.
3. k = k + m;: Calculates the next value of k by adding the current value of k and the updated value of m.
document.write("<br>");: This writes a <br> tag to the HTML document, creating a line break. This moves the output to the next line for the next iteration of the outer loop.
The outer loop continues until i becomes 5, at which point the entire program completes.

💯 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!