var Statement (Windows Scripting - JScript)

Artículo
07/17/2015

Declares a variable.

Syntax

var variable1 [ = value1 ] [, variable2 [ = value2], ...]

Arguments

variable1, variable2
The names of the variables being declared.
value1, value2
The initial value assigned to the variable.

Remarks

Use the var statement to declare variables. These variables can be assigned values at declaration or later in your script.

The first time a variable appears in your script constitutes its declaration.

You can declare a variable without using the var keyword and assign a value to it. This is known as an implicit declaration, and it is not recommended. An implicit declaration gives the variable global scope. When you declare a variable at the procedure level, though, you typically do not want it to have global scope. To avoid giving the variable global scope, you must use the var keyword in your variable declaration.

If you do not initialize your variable in the var statement, it is automatically assigned the JScript value undefined.

The following example illustrates the use of the var statement.

var index;
var name = "Thomas Jefferson";
var answer = 42, counter, numpages = 10;
var myarray = new Array();

Requirements

Version 1

Change History

Date	History	Reason
September 2009	Added information to Remarks.	Customer feedback.
March 2009	Added array declaration to the example.	Customer feedback.

September 2009

Added information to Remarks.

Customer feedback.

March 2009

Added array declaration to the example.