The Wolfram Language provides efficient system-independent direct access to all aspects of files of any size.

File Opening & Closing

OpenRead   ▪ OpenWrite   ▪ OpenAppend   ▪ CreateFile   ▪ Close

File Options

Options   ▪ SetOptions   ▪ CharacterEncoding   ▪ PageWidth   ▪ BinaryFormat

Streams

Streams   ▪ OutputStream   ▪ InputStream   ▪ StringToStream

Reading & Writing

Read   ▪ ReadList   ▪ ReadString   ▪ ReadLine   ▪ Write   ▪ WriteString   ▪ WriteLine

Byte , Number — specify data to read

Character   ▪ Record   ▪ Word   ▪ Real   ▪ String   ▪ Expression

RecordSeparators , WordSeparators — specify data delimiters

TokenWords   ▪ NullWords   ▪ NullRecords   ▪ RecordLists

Seeking in Streams

Skip   ▪ Find   ▪ StreamPosition   ▪ SetStreamPosition

Binary Data »

BinaryRead   ▪ BinaryReadList   ▪ ReadByteArray   ▪ BinaryWrite   ▪ ...

Stream Methods »

DefineInputStreamMethod   ▪ DefineOutputStreamMethod   ▪ ...

Related Tech Notes

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• Streams and Low‐Level Input and Output
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• Files and Streams
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• Binary Files

Related Guides

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• File Operations
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• Files
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• String Manipulation