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OpenRead

OpenRead["file"]

opens a file to read data from, and returns an InputStream object.

Details and Options

OpenRead prepares to read from a file, starting at the beginning of the file.
On systems that support pipes, OpenRead["!command"] runs the external program specified by command, and opens a pipe to get input from it.
If OpenRead does not succeed in opening a particular file or pipe, it generates a message and returns $Failed.
OpenRead resolves file names according to the procedure described in "Files and Streams".
The function ReadList automatically opens files or pipes that it needs.
OpenRead returns InputStream["name",n], where name is the full name of a file or command and n is a serial number that is unique across all streams opened in the current Wolfram System session.
With the option BinaryFormat->True, the stream is opened in binary format, so that no textual interpretation of newlines or other data is done.
With the Method option, the stream is opened using the given input stream method. This overrides the default way that OpenRead resolves file names.
OpenRead[File["file"]] is also supported.

Examples

open allclose all

Basic Examples (1)

Open a file:

Read the file:

Close the stream:

Scope (1)

Open the file specified by the File object:

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