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HoldRest
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HoldRest

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is an attribute which specifies that all but the first argument to a function are to be maintained in an unevaluated form.

Examples

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Basic Examples  (2)Summary of the most common use cases

In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-i4nvs
In[2]:=2
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https://wolfram.com/xid/0bdp5dtiq-dbqqd1
Out[2]=2
In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-bqhsa5
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0bdp5dtiq-d5suqu
Out[2]=2

Applications  (1)Sample problems that can be solved with this function

Implement your own conditional:

In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-4a0v
In[2]:=2
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https://wolfram.com/xid/0bdp5dtiq-dgml6
Out[2]=2
In[3]:=3
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https://wolfram.com/xid/0bdp5dtiq-sit2v
Out[3]=3

Properties & Relations  (4)Properties of the function, and connections to other functions

Use Evaluate to force evaluation of an argument of a HoldRest function:

In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-j0ftw9
In[2]:=2
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https://wolfram.com/xid/0bdp5dtiq-mcew2p
Out[2]=2

Suppress the evaluation of all but the first argument of a pure function:

In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-czyudm
Out[1]=1

Sequence splitting still happens for HoldRest functions:

In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-lfcrtp
In[2]:=2
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https://wolfram.com/xid/0bdp5dtiq-bw81s5
Out[2]=2

NHoldRest protects arguments from N, but evaluates them normally otherwise:

In[1]:=1
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https://wolfram.com/xid/0bdp5dtiq-my5f7u
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0bdp5dtiq-ironkn
Out[2]=2
In[3]:=3
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https://wolfram.com/xid/0bdp5dtiq-iacnz4
Out[3]=3
Wolfram Research (1988), HoldRest, Wolfram Language function, https://reference.wolfram.com/language/ref/HoldRest.html.
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Wolfram Research (1988), HoldRest, Wolfram Language function, https://reference.wolfram.com/language/ref/HoldRest.html.

Text

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

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

CMS

Wolfram Language. 1988. "HoldRest." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/HoldRest.html.

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Wolfram Language. 1988. "HoldRest." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/HoldRest.html.

APA

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

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

BibTeX

@misc{reference.wolfram_2025_holdrest, author="Wolfram Research", title="{HoldRest}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/HoldRest.html}", note=[Accessed: 21-June-2025 ]}

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@misc{reference.wolfram_2025_holdrest, author="Wolfram Research", title="{HoldRest}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/HoldRest.html}", note=[Accessed: 21-June-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_holdrest, organization={Wolfram Research}, title={HoldRest}, year={1988}, url={https://reference.wolfram.com/language/ref/HoldRest.html}, note=[Accessed: 21-June-2025 ]}

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@online{reference.wolfram_2025_holdrest, organization={Wolfram Research}, title={HoldRest}, year={1988}, url={https://reference.wolfram.com/language/ref/HoldRest.html}, note=[Accessed: 21-June-2025 ]}