Re: [Haskell-cafe] What is a safe Haskell data type to store and manipulate Money values?

On 5/04/2017, at 3:53 AM, Joachim Durchholz wrote:

Yeah, floating point is a no-go for monetary values. They can be the right tool when combining percentages, or actualy any factor that is supposed to be multiplied with a monetary value.

*Binary* floats, yes. But IEEE *decimal* floats were specifically designed to support commercial calculations, and the current COBOL standard offers decimal floats as one of three interpretations of COBOL fixed-point arithmetic. It helps to have hardware that supports decimal floats, of course. Probably no surprise that current z/Series and Power machines do, most others don't (yet).