!
NOT
!$delta
False
< =
小于或等于
$delta < = $omega
False
好,我们可以用逻辑操作符重写上面例子的代码,你看,下面的表述是不是更简单些?
--------------------------------------------------------------------------------
< ?
if ($day == "Thursday" && $time == "12" && $place == "Italy")
{
$lunch = "pasta";
}
--------------------------------------------------------------------------------
简单文雅吗? Yes
……