Real valued variable

Question

Suppose that a software developer decides to use a real-valued variable to represent the number of printers connected to a computer. why this is a bad idea?

Answer 1

Well, if you're writiting JavaScript, this is what you are doing.

Otherwise, it's just silly. If you have a small number of printers it can work, but I'd always fear the equality operator.

Answer 2

What about 2.639 connected printers?