NullRecords—Wolfram Documentation

is an option for Read and related functions which specifies whether null records should be taken to exist between repeated record separators.

Details

With the default setting NullRecords->False, repeated record separators are treated like single record separators.

Examples

Basic Examples (2)

Create a stream of records:

Read its records:

Close the stream:

Read the same stream including all zero length records:

History

Introduced in 1991 (2.0)

Wolfram Research (1991), NullRecords, Wolfram Language function, https://reference.wolfram.com/language/ref/NullRecords.html.

Text

Wolfram Research (1991), NullRecords, Wolfram Language function, https://reference.wolfram.com/language/ref/NullRecords.html.

CMS

Wolfram Language. 1991. "NullRecords." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NullRecords.html.

APA

Wolfram Language. (1991). NullRecords. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NullRecords.html

BibTeX

@misc{reference.wolfram_2025_nullrecords, author="Wolfram Research", title="{NullRecords}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/NullRecords.html}", note=[Accessed: 22-February-2026]}

BibLaTeX

@online{reference.wolfram_2025_nullrecords, organization={Wolfram Research}, title={NullRecords}, year={1991}, url={https://reference.wolfram.com/language/ref/NullRecords.html}, note=[Accessed: 22-February-2026]}