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WriteString["file","string"]

writes "string" to a file.

WriteString[channel,"string"]

writes "string" to a stream or process.

WriteString[channel,expr1,expr2,…]

converts the expri to strings, and then writes them in sequence to the specified output channel.

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WriteString

WriteString["file","string"]

writes "string" to a file.

WriteString[channel,"string"]

writes "string" to a stream or process.

WriteString[channel,expr1,expr2,…]

converts the expri to strings, and then writes them in sequence to the specified output channel.

Details

Examples

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Basic Examples  (2)

Write a string to a temporary file:

Wolfram Language code: file = CreateFile[];
Wolfram Language code: WriteString[file, "hello world"]

Print the file:

Wolfram Language code: FilePrint[file]

Close the file:

Wolfram Language code: Close[file];

Delete the temporary file:

Wolfram Language code: DeleteFile[file]

Open a stream:

Wolfram Language code: str = OpenWrite[]

Write to the stream:

Wolfram Language code: WriteString[str, "abc", "def"]

Close the stream:

Wolfram Language code: Close[str]

Print the file:

Wolfram Language code: FilePrint[%]

Scope  (1)

Write a string to a File object:

Wolfram Language code: file = File[CreateFile[]]
Wolfram Language code: WriteString[file, "hello world"]
Wolfram Language code: Close[file]

Print the file:

Wolfram Language code: FilePrint[file]

Delete the file:

Wolfram Language code: DeleteFile[file]

Properties & Relations  (1)

WriteString does not insert line breaks after each string it writes:

Wolfram Language code: file = File[CreateFile[]]
Wolfram Language code: WriteString[file, "this is some text"]; WriteString[file, "this is more text"]; Close[file]
Wolfram Language code: FilePrint[file]

Use WriteLine to automatically insert a trailing newline:

Wolfram Language code: WriteLine[file, "this is some text"]; WriteLine[file, "this is more text"]; Close[file]
Wolfram Language code: FilePrint[file]

Delete the temporary file:

Wolfram Language code: DeleteFile[file]
Wolfram Research (1988), WriteString, Wolfram Language function, https://reference.wolfram.com/language/ref/WriteString.html (updated 2016).

Text

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

CMS

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

APA

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

BibTeX

@misc{reference.wolfram_2026_writestring, author="Wolfram Research", title="{WriteString}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/WriteString.html}", note=[Accessed: 15-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_writestring, organization={Wolfram Research}, title={WriteString}, year={2016}, url={https://reference.wolfram.com/language/ref/WriteString.html}, note=[Accessed: 15-June-2026]}