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Re: Specify a variable


Mathematica has not data types, it use  patterns.

A floating point argument is the restricted pattern:

YourFunction[x_Real]:=Some code

and a pattern for a matrix is restricted by:

YourMatrixFunction[m_?MatrixQ]:=some othe code


Guojun Zhu wrote:
> Can I indicate a variable's type, a function, a real number, a matrix or
> a complex number?
> Can I specify it in functions such as D[], Integrate?

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