Why does Kotlin data class objects have backticks?

Question

This is my data class created using a Kotlin data class creator Plugin.

data class ResponseHealthInisghts(
val `data`: List<Data>,
val message: String,
val statusCode: Int
)

This code gets work even if I remove the backticks, I wonder if it's for Java interoperability. But this variable is not a keyword but also it has backticks. why? Based on Why does this Kotlin method have enclosing backticks? this question is is a keyword for both Java and Kotlin but data is not.

Answer 1

You can use backticks simply to enclose class, method or variable name

For example it's useful if there are spaces:

class `Final Frontier` {
    fun `out of space`() {
        val `first second`: String?
    }
}

Or as you mention if using Kotlin keyword

If a Java library uses a Kotlin keyword for a method

foo.`is`(bar)

data is a Modifier Keyword

data instructs the compiler to generate canonical members for a class The following tokens act as keywords in modifier lists of declarations and can be used as identifiers in other contexts

And not a Hard Keyword that can't be used as identifier

The following tokens are always interpreted as keywords and cannot be used as identifier

Answer 2

It allows you to use reserved keywords and operators as names of your variables. The list of those words: https://kotlinlang.org/docs/reference/keyword-reference.html