Is it permissible to use built-in primitive types in Kotlin for data storage?

In Kotlin, primitive types such as Int, Double, Boolean, and others are used for data storage and are built-in types of the language. During compilation, Kotlin optimizes their usage by replacing them with the corresponding JVM primitives (e.g., int, double), which ensures efficient storage and performance.

Therefore, using built-in primitive types in Kotlin for data storage is not only permissible but also recommended, especially when performance and memory savings are important.

Example:

val age: Int = 30
val price: Double = 99.99
val isActive: Boolean = true