@set statement

Statement

Use conditional compilation statements to create variables.

@set @varname = term

Parameters

VarName

Required option. A valid JScript variable name. You must always place a "@" character in front of you.

Term

Required option. 0 or more unary operators, followed by a constant, conditional-compilation variable, or an expression enclosed in parentheses.

Description

Conditional compilation supports numbers and Boolean variables. String not supported. Variables created with @set are usually used in conditional compilation statements, but can also be used anywhere in JScript code.

The example of a variable declaration looks as follows:

@set @myvar1 = 12@set @myvar2 = (@myvar1 * 20)@set @myvar3 = @_jscript_version

The following operators are supported in an expression enclosed in parentheses:

• ! ~
• * / %
• + -
• << >> >>>
• < <= > >=
• == != === !==
• & ^ |
• && | |

If the variable is used before the variable is defined, its value is NaN. NaN can be checked with @if statement:

@if (@newVar != @newVar)...

This succeeds because NaN is not equal to its own unique value.

Requirements

Version 3

Please see

Conditional Compilation | conditional Compilation Variables | @cc_on Statement | @if Statement