Mathematica > Core Language > Rules & Patterns > Patterns > RepeatedNull (...)
BUILT-IN MATHEMATICA SYMBOL

RepeatedNull

p... or RepeatedNull[p]
is a pattern object that represents a sequence of zero or more expressions, each matching p.

DetailsDetails

  • p... can appear as an argument of any function. It represents any sequence of arguments.
  • All the objects in the sequence represented by p... must match p, but the objects need not be identical.
  • The expression p may, but need not, itself be a pattern object.

ExamplesExamplesopen allclose all

Basic Examples (2)Basic Examples (2)

Replace any list of zero or more 's by :

In[1]:=
Click for copyable input
Out[1]=

Replace any list of zero or more 's with one argument:

In[1]:=
Click for copyable input
Out[1]=
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