MessageName

symbol::tag

is a name for a message.

Details

  • You can specify messages by defining values for symbol::tag.
  • symbol::tag is converted to MessageName[symbol,"tag"]. tag can contain any characters that can appear in symbol names. symbol::"tag" can also be used.
  • Assignments for s::tag are stored in the Messages value of the symbol s.
  • The f::usage message is typically defined for functions intended for general use, giving a description of how to use the function.
  • ?f prints out the message f::usage.
  • When ?form finds more than one function, only the names of the functions are printed.
  • You can switch on and off messages using On[s::tag] and Off[s::tag].
  • MessageName[symbol,"tag","lang"] or symbol::tag::lang represents a message in a particular language.

Examples

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Basic Examples  (2)

Define a usage message for a function:

Show the usage message:

Process messages generated during an evaluation:

Scope  (1)

Define a function that will test another function and give the argx message if needed:

Define g to use the test and return unevaluated when it fails:

Wolfram Research (1988), MessageName, Wolfram Language function, https://reference.wolfram.com/language/ref/MessageName.html (updated 2002).

Text

Wolfram Research (1988), MessageName, Wolfram Language function, https://reference.wolfram.com/language/ref/MessageName.html (updated 2002).

BibTeX

@misc{reference.wolfram_2021_messagename, author="Wolfram Research", title="{MessageName}", year="2002", howpublished="\url{https://reference.wolfram.com/language/ref/MessageName.html}", note=[Accessed: 04-August-2021 ]}

BibLaTeX

@online{reference.wolfram_2021_messagename, organization={Wolfram Research}, title={MessageName}, year={2002}, url={https://reference.wolfram.com/language/ref/MessageName.html}, note=[Accessed: 04-August-2021 ]}

CMS

Wolfram Language. 1988. "MessageName." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2002. https://reference.wolfram.com/language/ref/MessageName.html.

APA

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