how to create boolean Varibles ?

Questions & Answers
1

it's in the title.

2

like this :

var someBoolean : boolean = false;

then to change them :

function Start () {
     someBoolean = true;
}
4

In UnityScript -

var someVariable = true;

or

var someOtherVariable = false;

You can find all other types here: http://www.unifycommunity.com/wiki/index.php?title=Comparison_of_Programming_Languages#Other_Types

3

var theBooleanVariable : boolean;