i ++&之间有什么区别? ++ i [英] what is the difference between i++ & ++i

问题描述

我对i ++和++ i感到困惑.
请任何人帮我.

I have confusion with i++ and ++i .
Please any one help me.

推荐答案

如果您不确定表达式，则应该花时间研究 ^ ].牢记这些概念很重要.

If you are not sure about expressions then you should spend time studying the documentation[^]. It is important to get these concepts fixed in your mind.

第一种情况

First case

int i = 10;
int j = i++;

执行后， i的值为11 ，而 j的值为10 .
由于此运算符为POSTincrement，因此分配之后会自动发出通知.


第二种情况

After execution value of i would be 11 and value of j would be 10.
As this operator is POSTincrement , increament will be done AFTER the assignement.


Second case

int i = 10;
int j = ++i;

在执行的值后，我将为11 ，而 j的值将为11 .
由于此运算符是PREincrement，因此分配在之前会进行提示.

After execution value of i would be 11 and value of j would be 11.
As this operator is PREincrement , increament will be done BEFORE the assignement.

hi

一次看这个

hi

once lookat this

string[] items = {"a","b","c","d"};
int i = 0;
foreach (string item in items)
{
    Console.WriteLine(++i);
}
Console.WriteLine("");

i = 0;
foreach (string item in items)
{
    Console.WriteLine(i++);
}

输出将是

output will be

1
2
3
4

0
1
2
3

希望对您有帮助...

谢谢与问候
Sandeep

i hope it helps you...

Thanks&&Regards
Sandeep

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