Please help with this question

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2.33/5 (2 votes)

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I was asked in interview:

What is the difference between:

C#

if(i == 2)
{
}

and

C#

if(2 == i)
{
}

Posted 29-Aug-13 19:03pm

MoneyDude

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4 solutions

Solution 3

It will give same result but first one indicate that variable is compared against constant value and second one indicate that constant is compared against variable

Posted 29-Aug-13 19:45pm

sp_suresh

Solution 4

Yep they are same as far as C# is concerned. For more complex situations visit This Link

Thanks & Regard
Sham :)

Posted 29-Aug-13 19:52pm

Shambhoo kumar

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Archit Patel · Accepted Answer · 2013-08-29T19:30:00

It's a hold-over from C. In C, if you either use a bad compiler or don't have warnings turned up high enough, this will compile with no warning whatsoever (and is indeed legal code):

// Probably wrong
if (x = 2)
when you actually probably meant

if (x == 2)
You can work around this in C by doing:

if (2 == x)
A typo here will result in invalid code.

Now, in C# this is all piffle. Unless you're comparing two Boolean values (which is rare, IME) you can write the more readable code, as an "if" statement requires a Boolean expression to start with, and the type of "x=2" is Int32, not Boolean.

I suggest that if you see this in your colleagues' code, you educate them in the ways of modern languages, and suggest they write the more natural form in future.

In sort Both are same no difference between it.

Thanks7872 · Accepted Answer · 2013-08-29T19:17:00

Solution 1

I think you are looking for some thing similar to this

Why if( constant == variable ) is preferred instead of if ( variable == constant )[^]

How to check for equals? (0 == i) or (i == 0) [ See 2nd solution for C# ] [^]

Regards..:)

Posted 29-Aug-13 19:17pm

Thanks7872

Comments

Adarsh chauhan 30-Aug-13 2:01am

Good one.. my vote of 5

Thanks7872 30-Aug-13 2:02am

Thanks Adarsh..:-)

Shambhoo kumar 30-Aug-13 2:06am

great nice. my vote 5

Thanks7872 30-Aug-13 2:07am

Thanks Shambhoo.. :-)

Shambhoo kumar 30-Aug-13 2:07am

You most welcome.