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kotlinlang

question about kotlin's language design:
why are the primary constructor parameters specified next to the class name? wouldnt it be way more consistent with secondary constructors and other functions to have them next to `init` ?

The simple answer is probably because a lot of Kotlin’s syntax is borrowed from Scala.

Well Kotlin used the Scala syntax, and Scala probably based their syntax on Lisp. It’s pretty common in functional languages to define data types this way.

that may be so, but my question is: why? why is that common practice?

Well one of the reason is that this way of defining a class combines both the definitino of the class, with the definition of the contructor and the definition of the properties.

`data class User(val id: Int, val name: String)` is much shorter than defining a class, constructor and properties separately.