常量

常量

Core.nothingConstant.
nothing

The singleton instance of type Nothing, used by convention when there is no value to return (as in a C void function) or when a variable or field holds no value.

source
Base.PROGRAM_FILEConstant.
PROGRAM_FILE

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 @__FILE__.

source
Base.ARGSConstant.
ARGS

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

source
Base.C_NULLConstant.
C_NULL

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

source
Base.VERSIONConstant.
VERSION

A VersionNumber object describing which version of Julia is in use. For details see Version Number Literals.

source
Base.LOAD_PATHConstant.
LOAD_PATH

An array of paths for using and import statements to consdier as project environments or package directories when loading code. See Code Loading.

source
Base.Sys.BINDIRConstant.
Sys.BINDIR

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

source
Base.Sys.CPU_THREADSConstant.
Sys.CPU_THREADS

The number of logical CPU cores available in the system, i.e. the number of threads that the CPU can run concurrently. Note that this is not necessarily the number of CPU cores, for example, in the presence of hyper-threading.

See Hwloc.jl or CpuId.jl for extended information, including number of physical cores.

source
Base.Sys.WORD_SIZEConstant.
Sys.WORD_SIZE

Standard word size on the current machine, in bits.

source
Base.Sys.KERNELConstant.
Sys.KERNEL

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

source
Base.Sys.ARCHConstant.
Sys.ARCH

A symbol representing the architecture of the build configuration.

source
Base.Sys.MACHINEConstant.
Sys.MACHINE

A string containing the build triple.

source

参见: