How to find largest key in Scala Map

Last Updated : 26 Aug, 2019

In Scala, Map is same as dictionary which holds key:value pairs. In this article, we will learn how to find the largest key in given Map in Scala. The max() method is utilized to find the largest element of the map.
Syntax:

m1.max 
Here, m1 is name of a map.

Let’s try to understand it better with help of few examples.
Example #1:

// Scala program to get highest keys 
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating a map  
        val m1 = Map(3 -> "geeks", 4 -> "for", 2 -> "cs")  
          
  
        // Displays max key  
        println(m1.max)  
      
    }  
}  

Output:

(4, for)

Example #2: Iterate over only keys using keysIterator

// Scala program to get highest keys 
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating a map  
        val mapIm = Map("Ajay" -> 30,  
                        "Bhavesh" -> 20,  
                        "Charlie" -> 50)  
          
        // Displays output  
        println(mapIm.keysIterator.max)  
      
    }  
}  