(rnrs control (6)) library provides syntactic forms useful
for constructing conditional expressions and controlling the flow of
when form is evaluated by evaluating the specified test
expression; if the result is a true value, the expressions that
follow it are evaluated in order, and the value of the final
expression becomes the value of the entire
unless form behaves similarly, with the exception that the
specified expressions are only evaluated if the value of
test is false.
This form is identical to the one provided by Guile’s core library. See Iteration mechanisms, for documentation.
This form is identical to the one provided by Guile’s core library. See Case-lambda, for documentation.