Equivalent to C's `signed short` (`short`) type.

This type will almost always be [`i16`], but may differ on some esoteric systems. The C standard technically only requires that this type be a signed integer with at least 16 bits; some systems may define it as `i32`, for example.

[`char`]: type.c_char.html
[`i16`]: ../../primitive.i16.html
