PHP for loop Exercises: Print alphabet pattern O
PHP for loop: Exercise-27 with Solution
Write a PHP program to print alphabet pattern 'O'.
Visual Presentation:
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 :
PHP Code Editor:
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