1.

Explain Option and write its usage.

Answer»

The Scala Option[T] is referred to as a carrier of one element or none for a specified type. As the name suggests, this container holds either a Some or a None object, which represents a missing value. It holds Some[T] if a value is stored, otherwise none. In simple words, Scala options are WRAPPERS for missing values. 

EXAMPLE:

 object option { def main(args: Array[String]) { val employee: Map("InterviewBit" -> "Aarav", "Scaler" -> "ANKESH") val a= employee.get("InterviewBit") val B= employee.get("Informatica") println(a); println(b); } }

Output:  

Some(Aarav) None

Here, the key of the value InterviewBit is FOUND, therefore, Some is returned, however, the key of the value Informatica is not found, therefore, None is returned. 


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