Module Float.Class
Excluding nan the floating-point "number line" looks like:
t Class.t example ^ neg_infinity Infinite neg_infinity | neg normals Normal -3.14 | neg subnormals Subnormal -.2. ** -1023. | (-/+) zero Zero 0. | pos subnormals Subnormal 2. ** -1023. | pos normals Normal 3.14 v infinity Infinite infinity