3.2 SCM Primitive Procedures

Real-only versions of transcedental procedures (warning: these procedures are not compiled directly into the corresponding C library procedures, but a combination of internal SCM procedures, guaranteeing exact correspondence with the SCM interpreter while hindering the speed):

real-sqrt real-exp real-ln real-expt real-sin real-cos real-tan
real-asin real-acos real-atan real-sinh real-cosh real-tanh real-asinh
real-acosh real-atanh

Note Bene: These procedures are compiled to faster code than the corresponding generic versions sqrt, abs, … expt.

A selection of other extra primitives in SCM is also recognized as primitives. eg. get-internal-run-time, quit, abort, restart, chdir, delete-file, rename-file.