Kotlin Type Conversion

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

Program:

            /* ............... 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 ............... */
        

Output

Kotlin Type Conversion Example
After Conversion : 45

Notes:

• 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.

Tags

Type Conversion , Kotlin

1