w3resource

PHP for loop Exercises: Print alphabet pattern Q

PHP for loop: Exercise-29 with Solution

Write a PHP program to print alphabet pattern 'Q'.

Visual Presentation:

PHP for loop Exercises: Print alphabet pattern Q

Sample Solution:

PHP Code:

<?php
for ($row=0; $row<7; $row++)
{
  for ($column=0; $column<=7; $column++)
	{
  if (($column == 1 and $row != 0 and $row != 6) or ($row == 0 and $column > 1 and $column < 5) or ($column == 5 and $row != 0 and $row != 5) or ($row == 6 and $column > 1 and $column < 4) or ($column == $row - 1 and $row > 3))
            echo "*";    
        else  
            echo " ";     
	}        
  echo "\n";
}
?>

Output:

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

Explanation:

In the exercise above,

  • The code starts with a PHP opening tag <?php.
  • It utilizes a nested loop structure to iterate over rows and columns to create a specific pattern.
  • The outer loop (for ($row=0; $row<7; $row++)) controls the rows of the pattern, iterating from 0 to 6.
  • Inside the outer loop, there's another loop (for ($column=0; $column<=7; $column++)) that controls the columns, iterating from 0 to 7.
  • Within the inner loop, there's a conditional statement that determines whether to print an asterisk ('*') or a space ( ) based on the position of the current row and column indices.
  • The condition checks multiple cases:
    • If the column is at index 1 and the row is not at index 0 or 6.
    • If the row is at index 0 and the column is between indices 1 and 4.
    • If the column is at index 5 and the row is not at index 0 or 5.
    • If the row is at index 6 and the column is between indices 1 and 3.
    • If the column index is equal to the row index minus 1 and the row index is greater than 3.
  • If any of these conditions are met, an asterisk ('*') is echoed. Otherwise, a space ( ) is echoed.
  • After printing each row, the code moves to the next line by echoing a newline character ('\n').
  • Once all rows and columns are printed according to the pattern, the PHP code ends with a closing PHP tag ?>.

Flowchart :

Flowchart: Print alphabet pattern Q

PHP Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a PHP program to print alphabet pattern 'P'.
Next: Write a PHP program to print alphabet pattern 'R'.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.