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  fun main (args: Array<String>) { /* Smart Cast for nullable types is - !is - operator */ val obj: Any = 10 if (obj !is Long) { println ( "Obj is not string" ) } else { println ( "Obj is Long ${ obj } " ) } }

  fun main (args: Array<String>) { /* Type casting in kotlin unsafe vs safe cast operator as - as? */ val obj: Any? = null val name: String? = obj as? String println (name) }

Type conversion in Kotlin vs Java In Java, The data type is automatically converted to another data type but In Kotlin we need to explicitly convert the data type like toInt(), toLong(), toString() More Type cast methods in Kotlin toChar() - To convert a data tye to Char type toInt() - To convert a data type to Int type toLong() - To convert a data type to Long type toFloat() - To convert a data type to Float type toDouble() - To convert a data type to Double type toByte() - To convert a data type to Byte type toShort() - To convert a data type to Short type Example in Java Int is automatically converted to a Long data type as long is larger than int. public class Demo { // Type casting Java public static void main (String[] args) { int a = 10 ; long b = a; System. out .println(a); System. out .println(b); } } In Kotlin the conversion is not automatic, we need to explicitly do the type conversion. Example in Kotlin fun main (args: Array<

 

 

Lambda definition: Kotlin has concise (short) syntax for defining lambda functions, which makes it easier to work with functional programming constructs. Lambda Expression syntax in Kotlin: { argument -> businessloginwith_return } { a, b -> a+b } Lambda 

Immutable List can't be editable like add, edit or delete but we can retrieve the data Mutable List can be editable by add, edit, or delete