How to use nested function in Scala

Question

Can anyone provide an example regarding how nested function works in Scala?

Answer 1

Hey,

With Scala, we can define a Scala function inside another. This is what a local function looks like:

Let's take an example:

scala> def outer(){

| println("In outer")

| def inner(){

| println("In inner")

| }

| inner()

| }

outer: ()Unit

scala> outer()

The output will be:

In outer
In inner

One other example for your clear visual here:

scala> def outer(a:Int){

| println("In outer")

| def inner(){

| println(a*3)

| }

| inner()

| }
outer: (a: Int)Unit
scala> outer(3)

The Output will be

In outer
9

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