The meaning of OPTIONAL is involving an option : not compulsory. How to use optional in a sentence.

OPTIONAL meaning: 1. If something is optional, you can choose if you want to do it, pay it, buy it, etc.: 2. If…. Learn more.

adjective left to one's choice; not required or mandatory. Formal dress is optional. Synonyms: voluntary, elective, discretional leaving something to choice.

Feb 19, 2025 · The class template std::optional manages an optional contained value, i.e. a value that may or may not be present. A common use case for optional is the return value of a …

If something is optional, you can choose whether or not you do it or have it. A holiday isn't an optional extra. In this stressful, frantic world it's a must. Sex education is a sensitive area for …

Define optional. optional synonyms, optional pronunciation, optional translation, English dictionary definition of optional. adj. Left to choice; not compulsory or automatic. op′tion·al·ly adv. …

Definition of optional adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Synonyms for OPTIONAL: voluntary, elective, discretionary, alternative, unnecessary, chosen, alternate, unwanted; Antonyms of OPTIONAL: mandatory, compulsory, required, obligatory, …

If a value is present, apply the provided mapping function to it, and if the result is non-null, return an Optional describing the result. Otherwise return an empty Optional.

If you can choose whether or not to do something, it is optional. Extra credit is always optional; death and taxes are not. When you buy a new car, you can decide which options or choices, …