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Identity Function
Usage
Identity[expr] gives expr (the identity operation).
Basic example
In[1]:=Identity[x + y] Out[1]=x + y
Attribute
Protected
Relationships with other entities
Composition | Construct | Comap | InverseFunction | Sequence | Hold | IdentityMatrix
Typical ranks of usage in programs
322nd most common (1 in 11400 symbols)
432nd most common (1 in 21800 symbols)
708th most common (1 in 12000 symbols)
History
introduced in Version 1 (June 1988)
Timeline