Declaring a boolean in JavaScript using just var

Question

If I declare a JavaScript boolean variable like this:

var IsLoggedIn;

And then initialize it with either true or 1

Answer 1

Variables in Javascript don't have a type. Non-zero, non-null, non-empty and true are "true". Zero, null, undefined, empty string and false are "false".

There's a Boolean type though, as are literals true and false.