kotlin-9.kt

// 1. Smart cast example
fun getUserName(): String? = ... 
    val username = getUserName() 
    if (username != null) { 
      println(username.length) 
    } 

// 2. Another Example
fun getName(obj: Any?){ 
	if (obj == null || obj !is String) 
	{ return } 
    val string = obj println("Length of the string is ${string.length}") 
} 
	
getName(null) 
getName("Black Panther")

//Compiler output
Length of the string is 13