Click here to Skip to main content
Rate this: bad
Please Sign up or sign in to vote.
See more: C#2.0
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

1 solution

Rate this: bad
Please Sign up or sign in to vote.

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).
Prasad_Kulkarni at 27-Jun-12 1:39am
Good answer OG! +5!

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

  Print Answers RSS
Your Filters
0 Guruprasad.K.Basavaraju 450
1 Sergey Alexandrovich Kryukov 325
2 Shai Vashdi 318
3 OriginalGriff 265
4 Peter Leow 171
0 Sergey Alexandrovich Kryukov 9,109
1 OriginalGriff 5,290
2 Peter Leow 4,010
3 Maciej Los 3,535
4 Abhinav S 3,263

Advertise | Privacy | Mobile
Web02 | 2.8.140415.2 | Last Updated 27 Jun 2012
Copyright © CodeProject, 1999-2014
All Rights Reserved. Terms of Use
Layout: fixed | fluid