Kotlin Type Conversion

Chapter: Kotlin Last Updated: 17-11-2017 07:16:09 UTC


            /* ............... START ............... */
fun main(args : Array<String>) {

    /* In java we can assign value like this but in kotlin it will give error
    int number1 = 45;
    long number2 = number1;

    /* If we write code in kotlin it will look like this. It willt throw type mismatch error
    val number1: Int = 45
    val number2: Long = number1   // Error: type mismatch.

    //toLong explicitly converts to long

    println("Kotlin Type Conversion Example")
    val number1: Int = 45
    val number2: Long = number1.toLong()
    println("After Conversion : "+number2)

                /* ............... END ............... */


Kotlin Type Conversion Example
After Conversion : 45


  • In Kotlin, a numeric value of one type will not automatically converted to another type even when the other type is larger. This is different from how Java handles numeric conversions.
  • In the above program you can see that size of Long is larger than Int, but Kotlin doesn't automatically convert Int to Long.
  • In Kotlin we need to use toLong() explicitly to convert to Long. Please go through the program which explains about the Type Conversion in Kotlin.
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