gives information used to generate syntax coloring and other advisories when f[] is entered as input.


  • SyntaxInformation[f]={"prop1"->data1,"prop2"->data2,} defines syntax properties propi for f.
  • Possible properties include:
  • "ArgumentsPattern"patterns for the sequence of allowed arguments
    "LocalVariables"type and allowed positions of local variables
    "ColorEqualSigns"argument positions for which = should be colored
  • The setting for "ArgumentsPattern" is of the form {patt1,patt2,}, where the patti can be _, __, ___, _., OptionsPattern[], or {p1,}.
  • If the setting for "ArgumentsPattern" specifies that f takes options, then valid option names are determined from Options[f].
  • The setting for "LocalVariables" is of the form {"type",{imin,imax}}. Possible types include "Table", "Solve", "Integrate", "Limit", "Plot", "Manipulate". imin and imax give the minimum and maximum argument positions at which the variables can appear. imax can be Infinity.
  • A setting for "LocalVariables" of {"type",{imin,imax},"Lexical"} specifies that local variables that appear inside Dynamic should not be specially colored.
  • The setting for "ColorEqualSigns" is of the form {imin,imax}.


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Basic Examples  (2)

Specify that f should take exactly two arguments:

Set up options for f:

Specify that f should have two arguments, followed by options:

Inappropriate options are colored red:

Scope  (4)

The first argument of f should be a list of exactly two elements:

The first argument is allowed to be an expression such as a symbol, which could evaluate to a list:

f can have any number of arguments, but each should be a two-element list:

f should allow "Table-like" local iterator specifications at positions 2 through infinity:

f should have one ordinary argument, followed by iterator-type list arguments:

Wolfram Research (2007), SyntaxInformation, Wolfram Language function,


Wolfram Research (2007), SyntaxInformation, Wolfram Language function,


@misc{reference.wolfram_2020_syntaxinformation, author="Wolfram Research", title="{SyntaxInformation}", year="2007", howpublished="\url{}", note=[Accessed: 15-April-2021 ]}


@online{reference.wolfram_2020_syntaxinformation, organization={Wolfram Research}, title={SyntaxInformation}, year={2007}, url={}, note=[Accessed: 15-April-2021 ]}


Wolfram Language. 2007. "SyntaxInformation." Wolfram Language & System Documentation Center. Wolfram Research.


Wolfram Language. (2007). SyntaxInformation. Wolfram Language & System Documentation Center. Retrieved from