What is tail-recursion in Scala?

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Can anyone explain the function of tail-recursion in Scala?
Jul 26 in Apache Spark by Sumit
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1 answer to this question.

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Hey,

Recursion is when a function makes a call to itself. When we place this call as the last action performed in the function, we can call the function tail-recursive.

Here is an example:

scala> def factorial(n:Int):Int={

| if(n==1) return 1

| n*factorial(n-1)

| }

factorial: (n: Int)Int


scala> factorial(5)

The output will be:

Int = 120

answered Jul 26 by Gitika
• 25,300 points

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