max, min - find the maximum or minimum argument
(import (rnrs)) ;R6RS
(import (rnrs base)) ;R6RS
(import (scheme r5rs)) ;R7RS
(import (scheme base)) ;R7RS
(import (rnrs arithmetic fixnums)) ;R6RS
(import (rnrs arithmetic flonums)) ;R6RS
(max x1 x2 ...)
(fxmax fx1 fx2 ...) ;R6RS
(flmax fl1 fl2 ...) ;R6RS
(min x1 x2 ...)
(fxmin fx1 fx2 ...) ;R6RS
(flmin fl1 fl2 ...) ;R6RS
These procedures return the maximum or minimum of their
- Generic versions
For any real number object x that is not a NaN:
(max +inf.0 x) => +inf.0
(min -inf.0 x) => -inf.0
If any argument is inexact, then the result is also inexact (unless
the procedure can prove that the inaccuracy is not large enough to
affect the result, which is possible only in unusual implementations).
- Fixnum versions
The arguments and the return value are fixnums. There are no special
- Flonum versions
The arguments are the return value are flonums. If one or more of the
arguments is a NaN then a NaN is returned.
Returns a single number object.
(max 3 4) => 4
(max 3.9 4) => 4.0
(max 42 +nan.0) => +nan.0
The generic versions of these procedures work the same in all Scheme
This procedure can raise exceptions with the following condition types:
- &assertion (R6RS)
The wrong number of arguments was passed or an argument was outside its domain.
- &implementation-restriction (R6RS)
May be raised if
is used to compare number objects of mixed exactness, and the
numerical value of the result cannot be represented as an inexact
number object without loss of accuracy.
The reasons for
described above are errors.
Implementations may signal an error, extend the procedure's
domain of definition to include such arguments,
or fail catastrophically.
It is not specified how implementations should handle the
case described above, but the program may be stopped.
The generic versions of these procedures are in all Scheme reports
since R2RS. Early Scheme built on top of MacLISP also provided them.
The fixnum and flonum versions are new in R6RS.
This page is part of the
It includes materials from the RnRS documents.
More information can be found at
IEEE Scheme accidentally omitted
Markup created by unroff 1.0sc, March 04, 2023.