PHP implements while loop to print solid diamond

PHP implements while loop to print solid diamonds

In PHP, we can achieve the effect of printing solid diamonds through nested while loops . The following is a specific code example:

<?php
//Set the size of the diamond
$size = 5;

//Print the upper part of the diamond
$row = 1;
while ($row <= $size) {
    $col = 1;
    while ($col <= $size - $row) {
        echo " ";
        $col;
    }
    $col = 1;
    while ($col <= 2 * $row - 1) {
        echo "*";
        $col;
    }
    echo "
";
    $row ;
}

//Print the lower half of the diamond
$row = $size - 1;
while ($row >= 1) {
    $col = 1;
    while ($col <= $size - $row) {
        echo " ";
        $col;
    }
    $col = 1;
    while ($col <= 2 * $row - 1) {
        echo "*";
        $col;
    }
    echo "
";
    $row--;
}
?>

In the above code, we first set the size of the diamond to 5, and then print out the solid diamond through the nested while loop. The printing logic of the upper and lower halves is slightly different, but both achieve the diamond shape by controlling the number of spaces and asterisks.

I hope the above code is helpful to you. If you have any questions or need further explanation, please feel free to contact me.

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