SWI-Prolog -- function nan/0

Did you know ...

Search Documentation:

Function nan/0

Home
DOWNLOAD
DOCUMENTATION
- Manual
- Packages
- FAQ
- Command line
- PlDoc
- Bluffers▶
- License
- Publications
- Rev 7 Extensions
TUTORIALS
- Beginner▶
- Advanced▶
- Web applications▶
  - Web applications
  - Let's Encrypt!
- 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
- News
- Mail list
- Report a bug
- Submit a patch
- Submit an add-on
- Roadmap
- External links
- Contributors
- SWI-Prolog items
USERS
WIKI
- Login
- View changes
- Sandbox
- Wiki help
- All tags

Documentation
- Reference manual
  - Built-in Predicates
    - Arithmetic
      - General purpose arithmetic
        
        Arithmetic Functions
        
        -/1
        
        +/1
        
        +/2
        
        -/2
        
        */2
        
        f-//2
        
        mod/2
        
        rem/2
        
        f-///2
        
        div/2
        
        rdiv/2
        
        gcd/2
        
        abs/1
        
        sign/1
        
        copysign/2
        
        max/2
        
        min/2
        
        ./2
        
        random/1
        
        random_float/0
        
        round/1
        
        integer/1
        
        float/1
        
        rational/1
        
        rationalize/1
        
        float_fractional_part/1
        
        float_integer_part/1
        
        truncate/1
        
        floor/1
        
        ceiling/1
        
        ceil/1
        
        >>/2
        
        <</2
        
        f-\//2
        
        /\/2
        
        xor/2
        
        \/1
        
        sqrt/1
        
        sin/1
        
        cos/1
        
        tan/1
        
        asin/1
        
        acos/1
        
        atan/1
        
        atan2/2
        
        atan/2
        
        sinh/1
        
        cosh/1
        
        tanh/1
        
        asinh/1
        
        acosh/1
        
        atanh/1
        
        log/1
        
        log10/1
        
        exp/1
        
        **/2
        
        ^/2
        
        powm/3
        
        lgamma/1
        
        erf/1
        
        erfc/1
        
        pi/0
        
        e/0
        
        epsilon/0
        
        inf/0
        
        nan/0
        
        cputime/0
        
        eval/1
        
        msb/1
        
        lsb/1
        
        popcount/1
        
        getbit/2
- Packages

Availability:Arithmetic function (see is/2)

nan

Evaluate to Not a Number. See section 2.16.1.6.