Want a form of "program code" as the output of the algebra



I was asked, "Why? Whether you are a math," said"Because I want a way to be allowed to change the values ??of the parameters, the numerical solution of the equations obtained generic"I would often say.
If it was, the answer to the math equation, there is no necessity that appear algebraically.I think that may be the answer to the math "program code (numerical solution of equations) that takes a parameter."