Variables, data types in action script 3.0

Boolean -- Values can only be either "true" or "false."

Int -- Holds integer values that range from -2,147,483,648 (-231) to 2,147,483,647 (231 - 1).

Null -- Can only contain a "null" value. Variables also default to null if not assigned a default value.

Number -- Values can be integers, unsigned integers, or floating-point numbers.

Object -- Defined by the Object class.

String -- Values containing a sequence of 16-bit characters

Uint - Includes the set of unsigned integers from 0 to 4,294,967,295 (232 - 1).

Void -- Contains only the value "undefined."

Syntax:-

Boolean:-

Default : false

var a:Boolean;

trace(a);   //output  = false

(or)

var a:Boolean = true;

trace(a);    //output = true

Number:-

Default : NaN

var a:Number;

trace(a);  // output  =  NaN

(or)

var a:Number = 123;

trace(a);  //output  = 123;

int:-

Default : 0

var a:int;

trace(a);  // output  =  0

(or)

var a:int = 123;

trace(a);  //output  = 123;

String:-

Default : null

var a:String;

trace(a);  // output  =  null

(or)

var a:String = 'abcd';

trace(a);  //output  = abcd;

(or)

var a:String = "abcd";

trace(a);  //output  = abcd;

uint:-

Default : 0

var a:uint;

trace(a);  // output  =  0

(or)

var a:uint = 123456;

trace(a);  //output  = 123456;