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Why do we need to mention datatype of a variable inside foreach loop ?
 
foreach(string strName in strFilePath)
{
   //Operations here
}
 
Why cannot we declare it outside?
 
string strName = ""; 
foreach (strName in strFilePath)
{
   //Operations here
}
Posted 26-Jun-12 19:30pm
Edited 26-Jun-12 19:32pm
v2

1 solution

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Solution 1

Because the variable used in a foreach loop is special - it has limited scope and is read only.
 
The declaration is a reminder (if you like) that it is a special value, and not to be treated like "normal" variables. It limits the scope of the variable to just the extent of the loop without complex machinations. Otherwise, it would imply that the read-only status could be changed (which it can't) or that any initial value from before the loop began could be referenced (which it can't).
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Comments
Prasad_Kulkarni at 27-Jun-12 1:39am
   
Good answer OG! +5!

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