WOLFRAM

Wolfram Language & System Documentation Center
Wolfram Language Home Page »

ReadProtected
✖
ReadProtected

✖

is an attribute that prevents values associated with a symbol from being seen.

Details

  • Individual values associated with read‐protected symbols can be used during evaluation.
  • Definition[f], ?f, and related functions give only the attributes for read‐protected symbols f.

Examples

open allclose all

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

In[1]:=1
✖
https://wolfram.com/xid/0d6g60xuzc-bufqox
Out[1]=1
In[1]:=1
✖
https://wolfram.com/xid/0d6g60xuzc-hu4t7s

Properties & Relations  (2)Properties of the function, and connections to other functions

Definitions of a read-protected symbol are not shown:

In[1]:=1
✖
https://wolfram.com/xid/0d6g60xuzc-dbcvng
In[2]:=2
✖
https://wolfram.com/xid/0d6g60xuzc-eb0nmd
Out[2]=2

As long as the symbol is not locked, the read protection can be removed:

In[3]:=3
✖
https://wolfram.com/xid/0d6g60xuzc-mnm04
In[4]:=4
✖
https://wolfram.com/xid/0d6g60xuzc-bfqahb
Out[4]=4

If a symbol is locked and protected, its definitions can be neither changed nor read:

In[1]:=1
✖
https://wolfram.com/xid/0d6g60xuzc-e7zy5b
In[2]:=2
✖
https://wolfram.com/xid/0d6g60xuzc-gd592k
Out[2]=2
In[3]:=3
✖
https://wolfram.com/xid/0d6g60xuzc-b7z3a3
Wolfram Research (1988), ReadProtected, Wolfram Language function, https://reference.wolfram.com/language/ref/ReadProtected.html.
✖
Wolfram Research (1988), ReadProtected, Wolfram Language function, https://reference.wolfram.com/language/ref/ReadProtected.html.

Text

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

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

CMS

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

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

APA

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

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

BibTeX

@misc{reference.wolfram_2025_readprotected, author="Wolfram Research", title="{ReadProtected}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/ReadProtected.html}", note=[Accessed: 29-March-2025 ]}

✖
@misc{reference.wolfram_2025_readprotected, author="Wolfram Research", title="{ReadProtected}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/ReadProtected.html}", note=[Accessed: 29-March-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_readprotected, organization={Wolfram Research}, title={ReadProtected}, year={1988}, url={https://reference.wolfram.com/language/ref/ReadProtected.html}, note=[Accessed: 29-March-2025 ]}

✖
@online{reference.wolfram_2025_readprotected, organization={Wolfram Research}, title={ReadProtected}, year={1988}, url={https://reference.wolfram.com/language/ref/ReadProtected.html}, note=[Accessed: 29-March-2025 ]}