1 Running R⁵RS Programs

PLT Scheme provides several layers of support for programs written according to R⁵RS:

• DrScheme provides an R5RS language, which can be selected via the Language|Choose Language... menu item. See Choosing a Language in DrScheme: PLT Programming Environment for more information.

• The plt-r5rs executable runs an R⁵RS program or provides a read-eval-print loop for evaluating R⁵RS expressions and definitions. See plt-r5rs (later in this manual) for more information.

• The r5rs library implemented R⁵RS procedures and syntactic forms. It can also be used with #lang to create a module whose body is implemented in an R⁵RS-like language. See R⁵RS Module Language (later in this manual) for more information.

• The r5rs/init library extends r5rs to set parameters (such as case-insensitive symbol reading) for R⁵RS loading or an R⁵RS read-eval-print loop. See R⁵RS Initialization Library (later in this manual) for more information.