variable-declaration

I'm curious to know the difference between declaring a variable, and initializing a variable. e.g. var example; // this is declaring var example = "hi" // initializing? Or just "adding a value"? I don't think I'm right there, but what exactly is the definition of each? Or do they basically mean the same thing? Edit: @ThisClark said something in the comments, and I went to prove him wrong, and upon reading the spec some more I learned something: Here's an informative except from the specification : A var statement declares variables that are scoped to the running execution context’s

Our internal audit suggests us to use explicit variable type declaration instead of using the keyword var . They argue that using of var "may lead to unexpected results in some cases". I am not aware of any difference between explicit type declaration and using of var once the code is compiled to MSIL. The auditor is a respected professional so I cannot simply refuse such a suggestion. How about this... double GetTheNumber() { // get the important number from somewhere } And then elsewhere... var theNumber = GetTheNumber(); DoSomethingImportant(theNumber / 5); And then, at some point in the

I want to do this but it won't compile: Public MyVariable as Integer = 123 What's the best way of achieving this? .NET has spoiled us :) Your declaration is not valid for VBA. Only constants can be given a value upon application load. You declare them like so: Public Const APOSTROPHE_KEYCODE = 222 Here's a sample declaration from one of my vba projects: If you're looking for something where you declare a public variable and then want to initialize its value, you need to create a Workbook_Open sub and do your initialization there. Example: Private Sub Workbook_Open() Dim iAnswer As Integer

Consider the following program (see live demo here ). #include <stdio.h> int main(void) { int ; // Missing variable name puts("Surprise"); } My compiler, gcc 4.8.1, gives the below warning: [Warning] useless type name in empty declaration [enabled by default] Why does it compile fine? Shouldn't I get a compiler error? g++ 4.8.1 gives the following error when I compile it as a C++ program: [Error] declaration does not declare anything [-fpermissive] The C standard says A declaration other than a static_assert declaration shall declare at least a declarator (other than the parameters of a

In my mind, always, definition means storage allocation. In the following code, int i allocates a 4-byte (typically) storage on program stack and bind it to i , and i = 3 assigns 3 to that storage. But because of goto , definition is bypassed which means there is no storage allocated for i . I heard that local variables are allocated either at the entry of the function ( f() in this case) where they reside, or at the point of definition. But either way, how can i be used while it hasn't been defined yet (no storage at all)? Where does the value three assigned to when executing i = 3 ? void f()