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 "<br/>";
}
二、while循环
$a=1;
while ($a<=9){
$b=1;
while ($b<=$a){
echo "{$a}x{$b}=".($a*$b)." "." ";
$b++;
}
echo "<br/>";
$a++;
}
三、do while循环
$a=1;
do {
$b=1;
do {
echo "{$b}x{$a}=".($b*$a)." ";
$b++;
} while($b<=$a);
echo "<br/>";
$a++;
} while($a<=9);
四、表格展示
echo "<table width='1' border='1'>";
for($j=1;$j<=9;$j++) {
echo "<tr>";
for ($i = 1; $i <= $j; $i++) {
echo "<td>{$i}*{$j}=" . ($i * $j) . "</td>";
}
echo "</tr>";
}
echo "</table>";