Did you know ...
Search Documentation:
Predicate </2
HOME
DOWNLOAD
SWI-Prolog
Sources/building
Docker images
Add-ons
Browse GIT
DOCUMENTATION
Manual
Packages
FAQ
Command line
PlDoc
Bluffers
▶
Prolog syntax
PceEmacs
HTML generation
License
Publications
Rev 7 Extensions
TUTORIALS
Beginner
▶
Getting started
Learn Prolog Now!
Simply Logical
Debugger
Development tools
Advanced
▶
Modules
Grammars (DCGs)
clp(fd)
Printing messages
PlDoc
Web applications
▶
Web applications
Let's Encrypt!
Pengines
Semantic web
▶
ClioPatria
RDF namespaces
Graphics
▶
XPCE
GUI options
Machine learning
▶
Probabilistic Logic Programming
External collections
▶
Meta level tutorials
For packagers
▶
Linux packages
COMMUNITY
IRC
Forum & mailing list
Blog
News
Report a bug
Submit a patch
Submit an add-on
Roadmap (on GitHub)
External links
Contributing
Code of Conduct
Contributors
SWI-Prolog items
COMMERCIAL
WIKI
Login
View changes
Sandbox
Wiki help
All tags
Documentation
Reference manual
Built-in Predicates
Arithmetic
General purpose arithmetic
>/2
</2
=</2
>=/2
=\=/2
=:=/2
is/2
Arithmetic types
Rational number examples
Rational numbers or floats
IEEE 754 floating point arithmetic
Floating point arithmetic precision
Arithmetic Functions
Packages
Availability:
built-in
[ISO]
+Expr1
<
+Expr2
True if expression
Expr1
evaluates to a smaller number than
Expr2
.