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php学习之 循环结构实现代码_PHP

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Release: 2016-06-01 12:16:58
Original
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复制代码 代码如下:
/* 循环结构
* 一、while循环
* while(表达式)
* {
* 循环体;//反复执行,直到表达式为假
* }
* 二、do-while循环
* 三、for循环
*
* 根据循环条件不同,有两种类型的循环
*
* 一种:计数循环 (一般使用for)
* 另一种:条件型循环 (一般使用 while do-while)
*
*
*
*/
//while的使用
/*$num=0;
while($num{
echo "输出结果{$num}";
$num++;
}*/
//while输出表格
echo '';
echo '';
$i=0;
while($i{
//隔10次换一行
if($i%10==0)
{
if($i%20==0)
{
$bg="#ffffff";
}
else
{
$bg="#cccccc";
}
echo '';//输出隔行换色
}
echo '';
$i++;
if($i%10==0)
{
echo '';
}
}
echo '

使用while输出表格

'.$i.'
';
?>

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