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Write—Wolfram Documentation

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Write[channel,expr1,expr2,…]

writes the expressions expri in sequence, followed by a newline, to the specified output channel.

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Examples  
Basic Examples  
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Write

Write[channel,expr1,expr2,…]

writes the expressions expri in sequence, followed by a newline, to the specified output channel.

Details

  • The output channel used by Write can be a single file or pipe, or a list of them, each specified as a string "name", as File["name"], or as an OutputStream object.
  • Write is a low-level Wolfram Language output function. Functions like Print and Message are defined in terms of it.
  • If any of the specified files or pipes are not already open, Write calls OpenWrite to open them.
  • Write does not close files and pipes after it finishes writing to them.
  • By default, Write generates output in the form specified by the setting of the FormatType option for the output stream used.

Examples

open all close all

Basic Examples  (1)

Open a stream:

Wolfram Language code: str = OpenWrite[]

Write to the stream:

Wolfram Language code: Write[str, a ^ 2, 1 + b ^ 2]

Close the stream:

Wolfram Language code: Close[str]

Read the file:

Wolfram Language code: FilePrint[%]

Scope  (1)

Write an expression to the file specified by the File object:

Wolfram Language code: file = File[CreateFile[]]
Wolfram Language code: Write[file, 1 + b ^ 2]
Wolfram Language code: Close[file];
Wolfram Language code: FilePrint[file]
Wolfram Language code: DeleteFile[file];
Wolfram Research (1988), Write, Wolfram Language function, https://reference.wolfram.com/language/ref/Write.html (updated 2016).

Text

Wolfram Research (1988), Write, Wolfram Language function, https://reference.wolfram.com/language/ref/Write.html (updated 2016).

CMS

Wolfram Language. 1988. "Write." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2016. https://reference.wolfram.com/language/ref/Write.html.

APA

Wolfram Language. (1988). Write. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Write.html

BibTeX

@misc{reference.wolfram_2026_write, author="Wolfram Research", title="{Write}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/Write.html}", note=[Accessed: 14-November-2026]}

BibLaTeX

@online{reference.wolfram_2026_write, organization={Wolfram Research}, title={Write}, year={2016}, url={https://reference.wolfram.com/language/ref/Write.html}, note=[Accessed: 14-November-2026]}