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constants.rst

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.. currentmodule:: Base

Constants

.. variable:: nothing

   .. Docstring generated from Julia source

   The singleton instance of type ``Void``\ , used by convention when there is no value to return (as in a C ``void`` function). Can be converted to an empty ``Nullable`` value.


.. variable:: PROGRAM_FILE

   .. Docstring generated from Julia source

   A string containing the script name passed to Julia from the command line. Note that the script name remains unchanged from within included files. Alternatively see :data:`@__FILE__`\ .


.. variable:: ARGS

   .. Docstring generated from Julia source

   An array of the command line arguments passed to Julia, as strings.


.. variable:: C_NULL

   .. Docstring generated from Julia source

   The C null pointer constant, sometimes used when calling external code.


.. variable:: VERSION

   .. Docstring generated from Julia source

   A ``VersionNumber`` object describing which version of Julia is in use. For details see :ref:`man-version-number-literals`\ .


.. variable:: LOAD_PATH

   .. Docstring generated from Julia source

   An array of paths (as strings) where the ``require`` function looks for code.


.. variable:: JULIA_HOME

   .. Docstring generated from Julia source

   A string containing the full path to the directory containing the ``julia`` executable.


.. variable:: ANY

   .. Docstring generated from Julia source

   Equivalent to ``Any`` for dispatch purposes, but signals the compiler to skip code generation specialization for that field.


.. variable:: Sys.CPU_CORES

   .. Docstring generated from Julia source

   The number of CPU cores in the system.


.. variable:: Sys.WORD_SIZE

   .. Docstring generated from Julia source

   Standard word size on the current machine, in bits.


.. variable:: Sys.KERNEL

   .. Docstring generated from Julia source

   A symbol representing the name of the operating system, as returned by ``uname`` of the build configuration.


.. variable:: Sys.ARCH

   .. Docstring generated from Julia source

   A symbol representing the architecture of the build configuration.


.. variable:: Sys.MACHINE

   .. Docstring generated from Julia source

   A string containing the build triple.

See also:

:data:`STDIN` :data:`STDOUT` :data:`STDERR` :data:`ENV` :data:`ENDIAN_BOM` :data:`Libc.MS_ASYNC` :data:`Libc.MS_INVALIDATE` :data:`Libc.MS_SYNC` :data:`Libdl.DL_LOAD_PATH` :data:`Libdl.RTLD_DEEPBIND` :data:`Libdl.RTLD_LOCAL` :data:`Libdl.RTLD_NOLOAD` :data:`Libdl.RTLD_LAZY` :data:`Libdl.RTLD_NOW` :data:`Libdl.RTLD_GLOBAL` :data:`Libdl.RTLD_NODELETE` :data:`Libdl.RTLD_FIRST`