#Ruby's #Float contains interesting constants.
Like EPSILON, which is the
> difference between 1 and the smallest double-precision floating point number greater than 1.
What is it useful for, you ask?
Well, Floats are kinda difficult for computers and if you want to compare them for equality without using `round` or alike, you can check whether its difference is within EPSILON range.
So it is kinda close to how Math uses it (ε).