Tutorials

JavaScript Star Pattern 6

Posted in JavaScript Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 611 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

JavaScript Star Pattern 6

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

example.html

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<!DOCTYPE html>
<html>
<body>

<script>
var i, j, k;
for(i=5; i>=1; i--)
{
 for(j=i; j<5; j++)
  document.write("&nbsp;&nbsp;");
 for(k=i*2; k>1; k--)
  document.write("*");
 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;: This line declares three variables: i, j, and k which will be used in the loops to control the iterations.
for (i = 5; i >= 1; i--) {: This is the outer loop that iterates from i = 5 down to i = 1. This loop controls the number of rows in the pyramid.
Within the outer loop, there are two nested loops and some document.write statements. These nested loops and statements are responsible for creating the spaces and stars for each row.
1. for (j = i; j < 5; j++): The first nested loop is responsible for printing spaces. It starts from j = i and goes up to j = 4 (exclusive), which means it prints two spaces for each value of i from 5 down to 1. This creates the left indentation for the pyramid.
2. for (k = i * 2; k > 1; k--): The second nested loop is responsible for printing the stars. It starts from k = i * 2 and goes down to k = 2. For each value of i, it prints a decreasing number of stars multiplied by 2. This creates the pyramid pattern where each row has a decreasing number of stars.
3. document.write("*");: This statement is used within the inner star loop to write a single * character, contributing to the pyramid pattern.
4. document.write("<br>");: After the inner loops, this statement is used to write a line break, moving to the next row of the pyramid.
Once all the loops complete their iterations, the program will have generated the desired pyramid 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 star 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!