Find the nearest value of a discrete periodic function, given a point.
Periodic functions are functions that repeat. Discrete functions are functions whose values do not connect. An example of a discrete periodic function is the function of "Wednesdays" on a calendar. Wednesdays are discrete values along a timeline, and they repeat every 7 days.
The members of a periodic function's output are the "values." A single member is a "value."
The interval that the function repeats along is the "period."
A "point" is any value in the domain of the function.
Find the nearest value to point. Supply a value from the codomain of the function, and its period.
What if my point is equidistant between two values?
The value in front of your point will be chosen.