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PatternTest


is a pattern object that stands for any expression which matches p, and on which the application of test gives True.
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  • Any result for other than True is taken to signify failure.
  • The operator has a high precedence. Thus is , not .
  • In a form such as __?test every element in the sequence matched by must yield True when test is applied.
EXAMPLESCLOSE ALL
Basic Examples   (1)
Find cases of any expression which satisfies the NumberQ test:
Find cases of any expression which satisfies the NumberQ test:
In[1]:=
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Out[1]=
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