• Import can read any file as a sequence of unsigned 64-bit integers.
  • Export writes a list of integers in the range to a binary file.
  • Background

      Sequence of unsigned 64-bit integers.
      Raw binary format.
      Equivalent to the Byte format.

    Import and Export

    • Import["file","UnsignedInteger64"] imports any file, returning a packed array of integers in the range .
    • Export["file",list,"UnsignedInteger64"] exports a list of integers in the range to file.
    • Import["file",{"UnsignedInteger64",elem}] or Import["file",elem ] imports the specified element from file.
    • Import["file",{"UnsignedInteger64",{elem1,elem2,}}] imports multiple elements.
    • See the reference pages for full general information on Import and Export.
    • ImportString and ExportString support the UnsignedInteger64 format.


    • General Import elements:
    • "Elements" elements and options available in this file
      "Rules"full rules for each element and option
      "Options"rules for options, properties, and settings
    • Data representation element:
    • "Data"list of integers in the range
    • By default, Import and Export use the "Data" element.
    • Import["file",{"UnsignedInteger64",n}] gives the n^(th) 64-bit integer from file.
    • Trailing bytes are ignored if the size of the imported file is not a multiple of the data size.


    • General option:
    • ByteOrdering-1what byte ordering to use
    • Import option:
    • "HeaderBytes"0how many bytes to skip at the beginning of the file


    Basic Examples  (1)

    Convert a list of integers to a string representing a sequence of binary 64-bit integers:

    Click for copyable input

    Verify that the correct number of bytes was written:

    Click for copyable input

    Convert the binary data back to a list of numbers:

    Click for copyable input

    Read the same binary data, assuming it represents signed integers:

    Click for copyable input

    See Also

    "Binary"  "Bit"  "Byte"  "Character8"  "Character16"  "Integer8"  "Integer16"  "Integer24"  "Integer32"  "Integer64"  "Integer128"  "UnsignedInteger8"  "UnsignedInteger16"  "UnsignedInteger24"  "UnsignedInteger32"  "UnsignedInteger128"  "Real32"  "Real64"  "Real128"  "Complex64"  "Complex128"  "Complex256"  "String"

    Introduced in 2004
    | Updated in 2007