如何使用！ Scala中的运算符? [英] How to use the ! operator in scala?

问题描述

我是scala的新手，并且正在尝试一些基本操作来掌握这种语言.

I am new to scala and was trying a few basic operations to get a hang of the language.

我正在尝试使用逻辑运算符.例如:

I am trying to use the logical operators. For example :

 val a2 = 0x01&0xFF
 println(!a2)

我要取反a2的值，然后将其打印出来.但这给了我一个错误

I want to negate the value of a2 and then print it out. But it gives me an error saying

value unary_! is not a member of Int

我不确定如何使用NOt运算符.有人可以帮我吗?

I am not sure on how do I use the NOt operator. Could somebody help me?

推荐答案

使用按位而非运算符~.

val a2 = 0x01&0xFF
println(~a2)

检查当然，这是假设您要按位取反值，否则请使用-.

Of course, this is assuming you want to negate the value bitwise, otherwise use -.

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