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Microsoft® JScript™
++ and -- Operators
 Language Reference 
Version 1 

See Also


Description
Used to increment or decrement a variable by one.
Syntax
result = ++variable
result = --variable
result = variable++
result = variable--
Syntax 2
++variable
--variable
variable++
variable--

The syntax of the ++ and -- operators has these parts:

Part Description
result Any variable.
variable Any variable.
Remarks
The increment and decrement operators are used as a shortcut to modify the value stored in a variable. The value of an expression containing one of these operators depends on whether the operator comes before or after the variable:
var j, k
k = 2
j = ++k
j is assigned the value 3, as the increment occurs before the expression is evaluated. Contrast the following example:
var j, k
k = 2
j = k++
Here, j is assigned the value 2, as the increment occurs after the expression is evaluated.


© 1997 by Microsoft Corporation. All rights reserved.


file: /Techref/inet/iis/jscript/htm/js647.htm, 3KB, , updated: 1997/9/30 03:44, local time: 2024/11/8 23:46,
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