optional

Noun

capitalized sometimes

Something that is not compulsory, especially part of an academic course.

Japanese Meaning

必修ではなく、任意で選択できるもの、特に学科のカリキュラムにおいて必ず受講する必要がない科目などを指す。 / 必ずしも求められるものではなく、自由に選んで取り組むことができる内容

What is this buttons?

I chose an optional on Ancient Greek to satisfy my curiosity.

Google Translation / DeepL Translation

私は好奇心を満たすために古代ギリシャに関する選択科目を履修した。

Details

Sense（1）

Something that is not compulsory, especially part of an academic course.

Sense（2）

(programming, sometimes capitalized) In various programming languages, a kind of variable that is assigned a specific data type but may or may not hold an actual value.

In functional languages, there is a data type called the option type, also called the maybe type. Its purpose is to encapsulate a value, which is returned from a function. […] In Java 8, the Optional class has been added to serve as an option type.

Google Translation / DeepL Translation