JVM representation for primitive types

jvm_number_representation.kt

fun main() {
    val a: Int = 100
    val boxedA: Int? = a
    val anotherBoxedA: Int? = a
    // === means referential equality
    println(boxedA === anotherBoxedA) // true
    //JVM has predefined values for int between -128 to 127 hence above statement is true


    val b: Int = 10000
    val boxedB: Int? = b
    val anotherBoxedB: Int? = b
    println(boxedB === anotherBoxedB) // false


    val c: Int = 10000
    println(c == c) // Prints 'true'
    val boxedC: Int? = c
    val anotherBoxedC: Int? = c

    // data equality
    println(boxedC == anotherBoxedC) // Prints 'true'
}