How does Closure function works in Scala

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Can anyone explain how closure function works in Scala?
Jul 26, 2019 in Apache Spark by Mehnaj
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1 answer to this question.

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Hi,

A closure in Scala is a function whose value depends on variables declared outside of it. Let’s take an example:

scala> var c=5

c: Int = 5

scala> val mul2=(a:Int,b:Int)=>(a+b)*c

mul2: (Int, Int) => Int = $$Lambda$1533/239864031@6d90e705

scala> mul2(2,3)

The output will be:

Int = 25

scala> c=7

c: Int = 7

scala> mul2(2,3)

The output will be:

Int = 35

Here mul2 reads the new value of ‘c’ when we call it a second time.

If you want to know more about Apache Spark Scala, It's highly recommended to go for the Spark Training today.


answered Jul 26, 2019 by Gitika
• 65,910 points

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