Is it possible to define a data class without explicitly defining a constructor in a programming language?

In programming languages that support data classes (e.g., Kotlin), the constructor is usually generated automatically when declaring a class with parameters.

For example, in Kotlin, you can define a data class without explicitly writing a constructor:

data class User(val name: String, val age: Int)

Here, the constructor is generated automatically, and you don't need to write it explicitly.

If the class has no parameters, a default constructor is also generated automatically.

Thus, in modern languages with data class support, explicit constructor definition is not necessary — just specify parameters in the class declaration.