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Re: Can you type a command and have Mathematica show the parameters?
Perhaps you could use the ? option. For example you want to find out what are the paramters for CholeskyDecomposition. Simply type: ? CholeskyDecomposition <shift+enter> and it returns CholeskyDecomposition[m] gives the Cholesky decomposition of a matrix m. More... Click on more and it goes to the help. You can also do "? MyFunction" if you have already declared a function. For example if you create MyFunction as MyFunction[Avar_, Bvar_, Cvar] := Avar*Bvar/Cvar and then type ? MyFunction It will return MyFunction [Avar_, Bvar_, Cvar] := Avar*Bvar/Cvar