The phrase "an optional number of" is correct and usable in written English.
It can be used when referring to a quantity that is not fixed and can vary based on preference or requirement.
Example: "Participants can choose to submit an optional number of entries for the contest."
Alternatives: "a variable number of" or "a flexible number of".
The form comprised an optional number of scenes in mime and dance, prefaced by explanatory verses that were either spoken or sung; the scenes were accompanied by solo and choral songs with lute, and instrumental ensemble pieces for strings.
The process solves iteratively an optional number of design parameters.
The paper gives the extension of the Schmidt-Kuhlmann method for reciprocating compressor pipeline systems having a tree-structure, consisting of receivers and pipes with an optional number of branchings.
This paper presents the description and experimental results of a versatile Visual Marker based Multi-Sensor Fusion Stallowstomation that allows to combine a variable optional number of sensors and positioning algorithms in a loosely-coupling fashion, incorporating visual markers to increase its performances.
In this paper, we investigate and present an approach to creating all possible product configurations and variations based on a given number of base components and optional number of complementary components.
Contracting parties and optional numbers of mediators are in a relationship with several other classes.
The optional numbers of users all reach the upper limit, together with the maximum amount of interruption times and interruption duration.
Many diners probably don't realize that while tipping might technically be optional, a number of state laws assume that waiters and bartenders make enough in tips to make up for a portion of their required wages.
Lessons Learned (Optional): A number of clear lessons have come out of this JP 6.2 over its implementation period.
SL.p: (optional SLmin, SLmax): To gain an optimal number of test objects for the determination of the true spontaneous lethality, the user needs at least a rough idea about the SL prior to test planning.
(4)(Optional) Choose number of redundant features.
