PHP for loop Exercises: Print alphabet pattern O

Last update on May 31 2025 12:57:52 (UTC/GMT +8 hours)

27. Alphabet Pattern 'O'

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

Visual Presentation:

PHP for loop Exercises: Print alphabet pattern O

Sample Solution:

PHP Code:

<?php
// Loop for rows
for ($row=0; $row<7; $row++)
{
    // Loop for columns
    for ($column=0; $column<=7; $column++)
    {
        // Condition to determine whether to print '*' or ' '
        if ((($column == 1 or $column == 5) and $row != 0 and $row != 6) or (($row == 0 or $row == 6) and $column > 1 and $column < 5))
            echo "*";    // Print '*' if condition is met
        else  
            echo " ";    // Print ' ' if condition is not met
    }        
    echo "\n";    // Move to the next line after each row is printed
}
?>

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 two cases:

If the column is at index 1 or index 5, and the row is not at index 0 or index 6.
If the row is at index 0 or index 6, and the column is between indices 1 and 4.

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 :

For more Practice: Solve these Related Problems:

Write a PHP script to print the letter 'O' in a circular pattern using loops, ensuring the border is continuous.
Write a PHP function to generate an 'O' pattern with adjustable thickness of the border using nested loops.
Write a PHP program to output an 'O' pattern with a hollow center, ensuring the edges are properly connected.
Write a PHP script to create an 'O' pattern that scales with input size and maintains symmetry.

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