Native decimal types, if your system has them. Many languages and databases used in financial contexts do.

But native decimal libraries are almost always floating point.

Do people not know what a floating point number is?

	▲	lxgr 30 minutes ago \| parent [-]
		That’s alright, the important part here is that they’re decimal, not binary. You don’t want 0.1 + 0.2 to equal 0.300…004.