do {
statement;
statement;
...
} while (condition);
与 while 循环不同，do...while 循环在每个循环结束时将检查条件。该块将至少执行一次。当条件为 false 时，循环将会终止。
float $test = 0;
do {
print("$test equals: " +$test+"\n");
$test = $test + 1;
}
while ($test < 5);
它将在“脚本编辑器”(Script Editor)中显示以下行：
$test equals: 0 $test equals: 1 $test equals: 2 $test equals: 3 $test equals: 4