what is the difference between i++ & ++i

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

Posted 18-Jul-12 22:37pm

CH Guravaiah

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sandeep nagabhairava · Answer 1 · 2012-07-18T23:54:00

hi

once lookat this

C#

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++);
}

output will be

C#

i hope it helps you...

Thanks&&Regards
Sandeep

Richard MacCutchan · Answer 2 · 2012-07-18T23:34:00

Solution 2

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.

Posted 18-Jul-12 23:34pm

Richard MacCutchan

PrafullaVedante · Answer 3 · 2012-07-18T22:42:00

Solution 1

First case

C++

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

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

C++

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

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.

Posted 18-Jul-12 22:42pm

PrafullaVedante

Updated 19-Jul-12 20:54pm

v2

Comments

Nisarg S Shah 19-Jul-12 5:12am

I think that "i would be 11 and value of j would be 10." and "i would be 11 and value of j would be 11." should be highlighted along with AFTER and BEFORE.

PrafullaVedante 20-Jul-12 2:54am

Done :)