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Information
Information[
symbol
] prints information about a symbol.
Information[
symbol
] prints the same information as the input escape ??
symbol would give.
Information has attribute HoldAll.
See the Mathematica book: Section 1.3.9, Section A.2.11.
See also: Definition, Names, ValueQ, DownValues, UpValues.
Further Examples
This gives information about the symbol Factor. The shorthand form is ??Factor.
In[1]:= 
Factor[poly] factors a polynomial over the integers. Factor[poly, Modulus->p] factors a polynomial modulo a prime p. Factor[poly, Extension->{a1, a2, ... }] factors a polynomial allowing coefficients that are rational combinations of the algebraic numbers ai.
Attributes[Factor] = {Listable, Protected}
Options[Factor] = {Extension -> None, GaussianIntegers -> False, Modulus -> 0, Trig -> False}
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