Scala Mutable SortedMap keys() method with example

Last Updated : 4 May, 2020
The keys() method is utilized to give an iterator over all the keys of the SortedMap.
Method Definition: def keys: Iterable[A] Return Type: It returns an iterator over all the keys of the SortedMap.
Example #1: Scala 
// Scala program of keys()
// method
import scala.collection.SortedMap

// Creating object
object GfG
{ 

    // Main method
    def main(args:Array[String])
    {
    
        // Creating SortedMap
        val m1 = SortedMap("geeks" -> 5, "for" -> 3, "cs" -> 2)
        
        
        // Applying keys method 
        val result = m1.keys
        
        // Displays output
        println(result)
    }
}
Output: 
Set(cs, for, geeks)
Example #2: Scala 
// Scala program of keys()
// method
import scala.collection.SortedMap


// Creating object
object GfG
{ 

    // Main method
    def main(args:Array[String])
    {
    
        // Creating SortedMap
        val m1 = SortedMap("geeks" -> 5, "for" -> 3, "geeks" -> 5)
        
        
        // Applying keys method 
        val result = m1.keys
        
        // Displays output
        println(result)
    }
}
Output: 
Set(for, geeks)
So, the identical keys are taken only once.
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