php输出乘法口诀表的三种方法

/*for($i=1;$i<=9;$i++){
    for($j=1;$j<=$i;$j++){
        if($i<=4&&$i>2&&$j==2)
        echo "$i x $j = ".$i*$j."    ";
        else
        echo "$i x $j = ".$i*$j."  ";
    }
    echo "
";
}
$a=1;
while($a<=9){
    $b=1;
    while($b<=$a){
        echo "$a x $b = ".$a*$b."  ";
$b++;
    }
    echo"
";
    $a++;
}*/
$a=1;
do{
    $b=1;
do{
  
   echo "$a x $b = ".$a*$b."  ";
   $b++;
}while($b<=$a);

   echo"
";
    $a++;
}while($a<=9);

?>

转载于:https://www.cnblogs.com/duanbei/p/6065970.html