#else directive — Else for conditional compilation
#else
The #else
directive marks a
region of conditional compilation. Every #else
must be paired with an introductory
directive: #if
, #ifdef
, or #ifndef
. There can be any number of
intervening #elif
directives. If
the initial condition was false (0
), and every subsequent #elif
condition is false, statements that
follow the #else
directive are
compiled until the corresponding #endif
directive is reached.