PHP for loop Exercises: Construct a specific pattern, using nested for loop

Last update on December 20 2024 10:25:00 (UTC/GMT +8 hours)

Create a script to construct the following pattern, using nested for loop.

*  
* *  
* * *  
* * * *  
* * * * *

Visual Presentation:

Sample Solution:

PHP Code:

<?php
// Outer loop to control the rows
for($x=1;$x<=5;$x++)
{
   // Inner loop to control the columns within each row
   for ($y=1;$y<=$x;$y++)
    {
        // Print a star for each column
	    echo "*";
	    
        // Add a space after each star, except for the last one in the row
	    if($y < $x)
		 {
		   echo " ";
		 }
     }
     
     // Move to the next line after printing each row
     echo "\n";
}
?>

Output:

*                                                           
* *                                                         
* * *                                                       
* * * *                                                     
* * * * *

Explanation:

In the exercise above,

• The code starts with a PHP opening tag <?php.
• It contains an outer "for" loop that iterates through values from 1 to 5, controlling the rows of the pattern (for($x=1;$x<=5;$x++)).
• Inside the outer loop, there's an inner "for" loop that iterates through values from 1 to the current value of '$x', controlling the columns within each row (for ($y=1;$y<=$x;$y++)).
• Within the inner loop, a star ('*') is printed for each column (echo "";).
• Additionally, a space is printed after each star, except for the last one in the row, to create the triangular pattern (if($y < $x) { echo " "; }).
• After printing all the stars and spaces for a row, a newline character \n is printed to move to the next row (echo "\n";).
• This process continues until all rows have been printed.
• Finally, the PHP code ends with a closing tag ?>.

Flowchart :

PHP Code Editor:

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