CTAN Comprehensive TeX Archive Network

Environment query

This topic contains packages to examine the programming environment.

Detect “draft” and “final” class options.
Provides \ifetex switch.
Expandable checks for the current language.
Provides the \ifluatex switch.
Provides the \ifpdf conditional.
Conditionals to test which platform is being used.
Check if the engine is p or one of its derivatives.
Am I running under pdf, or Lua?.
Detects use of V and its facilities.
Am I running under ?.
Detect p and its derivatives.
Localisation support for and documents.
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