如果语句和&&或|| [英] If statements and && or ||

问题描述

好的，所以我是C#的初学者，在理解下面的if语句时遇到了麻烦.

OK so I'm a beginner with C# and I am having trouble understanding the if statement below.

在此示例中，INumber声明为8，dPrice为0，dTAX为10.

For this example INumber is declared as 8, dPrice is 0 and dTAX is 10.

        if (iNumber != 8 || iNumber != 9)
        {
            dPrice = dPrice + dTAX;
        }

有人可以解释为什么要输入该语句并将dTAX中的10加到dPrice吗?

Can somebody explain why it is entering the statement and adding the 10 from dTAX to dPrice?

我知道将其更改为&&可以，但是为什么呢?

I know changing it to && works, but why?

据我了解，如果iNumber不等于8或9，那么它应该仅输入If语句(此处是)，因此不应输入.

As I understand it, it should only enter the If statement, if iNumber does not equal 8 or 9, which here it does, so it should not enter.

通过||运行后，这是我的输出if语句.

Here are my outputs after running it through the || if statement.

        Inumber is: 8

        dPrice was: 0
        dPrice is now: 10

        dTAX is: 10

有人可以向我解释一下吗?

Can somebody please explain this to me?

推荐答案

它正在输入语句，因为该语句在计算iNumber！= 9时变为true

It is entering the statement because the statement becomes true when it calculates iNumber != 9

一个||如果任何语句为true，则if中的(或运算符)将为true.

An || (Or Operator) in an if will be true if any statement is true.

这样想吧.

8 != 8 is False
8 != 9 is True

if ( False || True )
{
    //Do Stuff
}

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