PHP Number Pattern 62

Posted in PHP Tutorial

Updated on Jan 10, 2024

By Mari Selvan

👁️ 236 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

PHP Number Pattern 62

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

example.php

Copied

<?php
$a = [];
$low = 0;
$high = 9; 
$n = 1; 
for($i=0; $i<5; $i++, $low++, $high--)
{
 for($j=$low; $j<=$high; $j++, $n++)
  $a[$i][$j] = $n;
 for($j=$low+1; $j<=$high; $j++, $n++)
  $a[$j][$high] = $n;
 for($j=$high-1; $j>=$low; $j--, $n++)
  $a[$high][$j] = $n;
 for($j=$high-1; $j>$low; $j--, $n++)
  $a[$j][$low] = $n;
}
echo "Perfect Square Spiral<br>";
for($i=0; $i<10; $i++)
{
 echo "<br>";
 for($j=0; $j<10; $j++)
  echo "<div>".$a[$i][$j]."</div>";
}
echo "<br>";
?>

💻 Testing the Program

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

Output

1    2    3    4    5    6    7    8    9   10
36  37   38   39   40   41   42   43   44   11
35  64   65   66   67   68   69   70   45   12
34  63   84   85   86   87   88   71   46   13
33  62   83   96   97   98   89   72   47   14
32  61   82   95  100   99   90   73   48   15
31  60   81   94   93   92   91   74   49   16 
30  59   80   79   78   77   76   75   50   17
29  58   57   56   55   54   53   52   51   18
28  27   26   25   24   23   22   21   20   19

🧠 How the Program Works

Let's break down the logic behind the code:

$a = [];: Initializes an empty two-dimensional array called $a, which will be used to store the spiral pattern.
$low = 0;: Initializes a variable $low with the value 0. This variable will be used to track the lower bound of the spiral.
$high = 9;: Initializes a variable $high with the value 9. This variable will be used to track the upper bound of the spiral.
$n = 1;: Initializes a variable $n with the value 1. This variable represents the current number to be placed in the spiral pattern.
The outer loop (for($i=0; $i<5; $i++, $low++, $high--)) runs 5 times, creating 5 layers of the spiral. In each iteration, the following steps are performed:
1. A nested loop (for($j=$low; $j<=$high; $j++, $n++)) runs from $low to $high and assigns the value of $n to the element at index $i and $j of the array $a.
2. Another nested loop (for($j=$low+1; $j<=$high; $j++, $n++)) runs from $low + 1 to $high and assigns the value of $n to the element at index $j and $high of the array $a.
3. Another nested loop (for($j=$high-1; $j>=$low; $j--, $n++)) runs from $high - 1 to $low and assigns the value of $n to the element at index $high and $j of the array $a.
4. Another nested loop (for($j=$high-1; $j>$low; $j--, $n++)) runs from $high - 1 to $low + 1 and assigns the value of $n to the element at index $j and $low of the array $a.
After the loops have completed, the program enters an echo statement to display the label "Perfect Square Spiral" on the webpage.
A nested loop (for($i=0; $i<10; $i++)) runs 10 times to iterate through each row of the array.
1. Inside this loop, another nested loop (for($j=0; $j<10; $j++)) runs 10 times to iterate through each column of the array.
  - The innermost part of this loop echoes the value of $a[$i][$j] wrapped in a <div> element. This displays the numbers in the 10x10 grid format.
Finally, an echo statement adds a line break (<br>) to separate the grid from the rest of the 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!