PHP学习-循环

三大循环：for; while; do while;

echo "for

";                     //for循环
for($i=0;$i<10;$i++){
    echo 'hello---'.$i.'
';
}
echo "

";

echo "while

";                   //while循环
$i=0;
while($i<10){
    echo 'hello---'.$i.'
';
      $i++;
}
echo "

";

echo "do while

";                //do while循环
$i=0;
do{
    echo 'hello---'.$i.'
';
    $i++;
}while($i<10);