Use of Unassigned Local Variable ‘n’

Posted Date: 28 Sep 2008	Resource Type: Errors and Solutions	Category: General
Author: Bindu Bujji	Member Level: Gold
Rating:	Points: 4

This error message indicates that you declared a variable but didn't give it an initial value. This is usually an oversight, but it can occur when you really meant to pass a variable as an out argument to a method.

Take a look at the following example:

public class MyClass
{
public void SomeMethod()
{
int n; \\ Not initialized with a value.
\\ This is fine because C# only returns a value in n; it does not
\\ pass a value into the method.
OtherMethod(out n);
}
public void OtherMethod(out int n)
{
n = 1; \\ Value is assigned here.
}
}
In this case, n is not assigned a value inside of SomeMethod(), but it is assigned in OtherMethod(). Okay!

In fact, OtherMethod() ignores the value of an out argument as if it didn't exist — which it doesn't in this case.

Responses

Author: Parvathi 02 May 2009

Member Level: Gold Points : 1

While using out parameter both the method declaration and method definition should have the out keyword.

If the value is not initialized with in the method it gives an error.

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