How to reverse a String in Scala?

How to reverse a list in scala

Last Updated : 17 Apr, 2019

In Scala, list is defined under scala.collection.immutable package. A list is a collection of same type elements which contains immutable data. We use reverse function to reverse a list in Scala. Below are the examples to reverse a list.

Reverse a simple list

scala

// Scala program to reverse a simple Immutable lists 
import scala.collection.immutable._

// Creating object 
object GFG 
{ 
    // Main method 
    def main(args:Array[String]) 
    { 
        // Creating and initializing immutable lists 
        val mylist: List[String] = List("Geeks", "For",
                                "geeks", "is", "best") 
    
        // Display the value of mylist1 
        println("Reversed List is: " + mylist.reverse) 
    
    } 
}

Output:

Reversed List is: List(best, is, geeks, For, Geeks)

Reverse a list using for loop

scala

// Scala program to print reverse immutable lists 
// using for loop
import scala.collection.immutable._

// Creating object 
object GFG
{ 
    // Main method 
    def main(args:Array[String]) 
    { 
        // Creating and initializing immutable lists 
        val mylist: List[String] = List("Geeks", "For", "geeks", "is",
                                        "a", "fabulous", "portal")

        // Display the value of mylist in
        // reverse order using for loop 
        for(element<-mylist.reverse) 
        { 
            println(element) 
        } 
    } 
}

Output:

portal
fabulous
a
is
geeks
For
Geeks

Reverse a list using foreach loop

scala

// Scala program to reverse a list
// using foreach loop
import scala.collection.immutable._

// Creating object 
object GFG
{ 
    // Main method 
    def main(args:Array[String]) 
    { 
        // Creating and initializing immutable lists 
        val mylist = List("Geeks", "For", "geeks", "is",
                        "a", "fabulous", "portal")
        
        print("Original list is: ")
        
        // Display the value of mylist using for loop 
        mylist.foreach{x:String => print(x + " ") }
        
        // calling reverse function
        println("\nReversed list: " + mylist.reverse)
    } 
}

Output:

Original list is: Geeks For geeks is a fabulous portal 
Reversed list: List(portal, fabulous, a, is, geeks, For, Geeks)

How to reverse a String in Scala?

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