PHP的99乘法表三种循环表示

99乘法表

一、for循环

$num=1;
for ($a=1;$a<=9;$a++){
    for ($b=1;$b<=$a;$b++)
        echo "$a"."x"."$b"."=".$a*$b." ";
    echo "
";
}

二、while循环

$a=1;
while ($a<=9){
    $b=1;
    while ($b<=$a){
        echo "{$a}x{$b}=".($a*$b)." "." ";
        $b++;
    }
    echo "
";
    $a++;
}

三、do while循环

$a=1;
do {
    $b=1;
    do {
        echo "{$b}x{$a}=".($b*$a)." ";
        $b++;
    } while($b<=$a);
    echo "
";
    $a++;
} while($a<=9);

四、表格展示

echo "";for($j=1;$j<=9;$j++){echo"";for($i=1;$i<=$j;$i++){echo"";}echo"";}echo"

 
     

            
         
{$i}*{$j}=" . ($i * $j) . "
    
     

 
";