Enum Solidity Understanding

Question

I am trying to understand solidity bit better, however the underscores drive me crazy.

Let’s say I declare an enum

enum wine {red, white}

And now I declare a variable of type enum and I assign a value

wine _wine = wine.red

Why do I need there an underscore in front of the second wine?

Happy for comments!

Answer 1

You cannot have a variable with the same name as an already existing datatype.

Example from many other typed languages:

// ok
string _string = "hello";

// error - cannot have a `string` type variable called `string`
string string = "hello";

In your case, wine specifies the datatype, and _wine is the variable name.