感叹号(！)运算符用于 vb.net 中的数字，这是做什么的? [英] Exclamation(!) operator used on a number in vb.net, what does this do?

问题描述

我正在查看继承的代码，我在 vb.net windows 窗体中发现了这个:

I'm looking at inherited code and I found this in a vb.net windows form:

New System.Drawing.SizeF(6.0!, 13.0!)

我的问题是，!(感叹号)运算符在这里的意义是什么?我对感叹号运算符的大部分搜索最终都会返回记录集格式，或者 ! 在搜索中被忽略，我得到了数百个不相关的项目.

My question is, what is the significance of the ! (exclamation) operator here? Most of my searching for the exclamation operator ends up returning recordset format or the ! gets ignored in the search and I get hundreds of unrelated items.

推荐答案

强制文字为 Single.

It's to force the literal to be a Single.

Visual Basic 支持类型字符:

Visual Basic supports Type Characters:

除了在声明语句中指定数据类型外，您还可以使用类型字符强制某些编程元素的数据类型.类型字符必须紧跟在元素之后，中间不能有任何类型的字符.

In addition to specifying a data type in a declaration statement, you can force the data type of some programming elements with a type character. The type character must immediately follow the element, with no intervening characters of any kind.

和:

文字也可以使用标识符类型字符(%、&、@、!、#、$)，变量、常量和表达式也可以.但是，文字类型字符(S、I、L、D、F、R、C)只能与文字一起使用.

Literals can also use the identifier type characters (%, &, @, !, #, $), as can variables, constants, and expressions. However, the literal type characters (S, I, L, D, F, R, C) can be used only with literals.

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