Conditional Compilation Variables

Microsoft® JScript™
Conditional Compilation Variables

The following predefined variables are available for conditional compilation. If a variable is not true, it is not defined and behaves as NaN when accessed.

Variable Description

@_win32 true if running on a Win32 system.

@_win16 true if running on a Win16 system.

@_mac true if running on a Apple Macintosh system.

@_alpha true if running on a DEC Alpha processor.

@_x86 true if running on an Intel processor.

@_mc680x0 true if running on a Motorola 680x0 processor.

@_PowerPC true if running on a Motorola PowerPC processor.

@_jscript Always true.

@_jscript_build Contains the build number of the JScript scripting engine.

@_jscript_version Contains the JScript version number in major.minor format.

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Variable	Description
@_win32	true if running on a Win32 system.
@_win16	true if running on a Win16 system.
@_mac	true if running on a Apple Macintosh system.
@_alpha	true if running on a DEC Alpha processor.
@_x86	true if running on an Intel processor.
@_mc680x0	true if running on a Motorola 680x0 processor.
@_PowerPC	true if running on a Motorola PowerPC processor.
@_jscript	Always true.
@_jscript_build	Contains the build number of the JScript scripting engine.
@_jscript_version	Contains the JScript version number in major.minor format.