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<?php
$s=0;
echo '<table width="800" border="1">';
while ( $s<100){
if($s ==0){
using use using using using using using ‐ ‐ ‐ echo '<tr>'-- s.'</tr>';
s.'</td>';
$s ;
}echo '</table>';
appear when written like this?
The reason for echo '<tr>'.$s.'</tr>'; is because you directly output the value in tr after each $s%==0. The tr output content will be displayed directly above the table. Normally, the <tr> set of <td> tags will be used.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The reason for echo '<tr>'.$s.'</tr>'; is because you directly output the value in tr after each $s%==0. The tr output content will be displayed directly above the table. Normally, the <tr> set of <td> tags will be used.