General question c#

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My code snip is something like

C#

bool success;
foreach (object item in items)
{
    if (something)
        sucess = true;
}
if (success)
    break;

It gives me error
Use of unassign local variable 'success'

I know that if I initialize it like

bool success = false;

it will work fine.

but My question is why so? if default value of bool variable is false

Thanks

:)

Posted 29-Mar-10 19:12pm

Khaniya

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3 solutions

Solution 3

Khaniya wrote:
sucess = true;

Bad spelling. You should have:

success = true;

Of course, the other two answers are right.

Posted 29-Mar-10 21:51pm

Toli Cuturicu

Solution 1

I don't know why C# ignores the default values for variables, but if you create it, and only some code paths assign it, you get this error. C# sucks like that.

Posted 29-Mar-10 19:18pm

Christian Graus

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

**PSK_** · Accepted Answer · 2010-03-29T19:29:00

In c# only the member variables gets assigned with the default values, all the local vaiabiable needs to be assigned explictely.

This is basic rule that you can’t access a variable which is not assigned any value. In you case compiler is not sure that if foreach loop will run or not and same with the if condition within for loop, thats why you are getting the error.

For example

bool success;

if(something)
{
 success= false;
}

// you will get error

bool success;

If(something)
{
success=false;
}
else
{
success=true;
}

//you will not get any error, because success will get a value in any case.

General question c#

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General question c#

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