What is the scope of the counter variable in a for loop?

Question

I get the following error in Visual Studio 2008:

Error 1 A local variable named \'i\' cannot be declared in this scope because it would give a different meaning

Answer 1

Just some background information: The sequence doesn't come into it. There's just the idea of scopes - the method scope and then the for loop's scope. As such 'once the loop terminates' isn't accurate.

You're posting therefore reads the same as this:

int i = 0; // scope error
string str = ""; // no scope error

for (int i = 0; i < 3; i++)
{
  string str = "";
}

I find that thinking about it like this makes the answers 'fit' in my mental model better..