9*9乘法表

Posted 2020-10-05 Wzybnzy

<?php
echo "99乘法表<br/>";
    echo "for循环<br/>";
    for ($i = 1; $i <= 9; $i++) {
       for ($j = 1; $j <= $i; $j++) {
          echo " " . $j . "*" . $i . ‘=‘ .  $i * $j . "　　";
       }
       echo "<br/>";
    }
    echo "<br/><br/>";


    echo "while循环<br/>";
    $m = 1;
    while ($m < 9) {
        $m++;
        $n =1;
        while ($n <= $m) {
            echo " " . $n . "*" . $m . ‘=‘ .  $n * $m . "　　";
            $n++;
        }
        echo "<br/>";
    }
    echo "<br/><br/>";



    echo "dowhile<br/>";
    $x = 1;
    do {
        $y =1;
        do {
           echo " " . $x . "*" . $y . ‘=‘ .  $x * $y . "　　";
            $y++;
        } while ($y <= $x);
        $x++;
        echo "<br/>";
    } while ($x <= 9);
    echo "<br/><br/>";


    echo "foreach<br/>";
    $arr = array(1,2,3,4,5,6,7,8,9);
    foreach ($arr as $key=>$val1) {
        foreach ($arr as $key => $val2) {
            if ($val2 <= $val1) {
                echo $val1 . "*". $val2 ."=". $val1 * $val2 . "　　";
            }
        }
        echo "<br/>";
    }