Nothing
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Nothing
Details

- Nothing is removed as part of the standard evaluation process. It is not removed in expressions that are held or inactive.
Examples
open allclose allBasic Examples (2)Summary of the most common use cases
Scope (2)Survey of the scope of standard use cases
Generalizations & Extensions (1)Generalized and extended use cases
Applications (1)Sample problems that can be solved with this function
Properties & Relations (3)Properties of the function, and connections to other functions
Nothing is removed during the standard evaluation process:
In[1]:=1

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https://wolfram.com/xid/0en0wofle-bs6g21
Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0en0wofle-86mw4x
Out[2]=2

Remove primes from a list by replacing them with Nothing:
In[1]:=1

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https://wolfram.com/xid/0en0wofle-v2jio
Out[1]=1

Delete the primes with a pattern:
In[2]:=2

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https://wolfram.com/xid/0en0wofle-nzk1o2
Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0en0wofle-dqqeth
Out[3]=3

Nothing will only disappear inside lists:
In[1]:=1

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https://wolfram.com/xid/0en0wofle-r3iems
Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0en0wofle-c63hxf
Out[2]=2

An empty Sequence[] will evaporate inside any head except those with special attributes:
In[3]:=3

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https://wolfram.com/xid/0en0wofle-rw3umz
Out[3]=3

In[4]:=4

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https://wolfram.com/xid/0en0wofle-zthm1n
Out[4]=4

Possible Issues (1)Common pitfalls and unexpected behavior
Wolfram Research (2015), Nothing, Wolfram Language function, https://reference.wolfram.com/language/ref/Nothing.html (updated 2016).
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Wolfram Research (2015), Nothing, Wolfram Language function, https://reference.wolfram.com/language/ref/Nothing.html (updated 2016).
Text
Wolfram Research (2015), Nothing, Wolfram Language function, https://reference.wolfram.com/language/ref/Nothing.html (updated 2016).
✖
Wolfram Research (2015), Nothing, Wolfram Language function, https://reference.wolfram.com/language/ref/Nothing.html (updated 2016).
CMS
Wolfram Language. 2015. "Nothing." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2016. https://reference.wolfram.com/language/ref/Nothing.html.
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Wolfram Language. 2015. "Nothing." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2016. https://reference.wolfram.com/language/ref/Nothing.html.
APA
Wolfram Language. (2015). Nothing. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Nothing.html
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Wolfram Language. (2015). Nothing. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Nothing.html
BibTeX
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@misc{reference.wolfram_2025_nothing, author="Wolfram Research", title="{Nothing}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/Nothing.html}", note=[Accessed: 09-July-2025
]}
BibLaTeX
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@online{reference.wolfram_2025_nothing, organization={Wolfram Research}, title={Nothing}, year={2016}, url={https://reference.wolfram.com/language/ref/Nothing.html}, note=[Accessed: 09-July-2025
]}