Hey Should we use annotations(Like @NonNull or @Nullable) with function arguments in kotlin to specify if function arguments are NonNull(Asking because of Null type handling in Kotlin being different) For Example

fun callApi(@NonNull context: Context) : String{
        return "hello world!"
    }

Context

is already not nullable, so the annotation is superfluous

okkk, also i had doubt about kotlin way of handling it I mean following code :

fun callApi( str: String) : String{
        return "hello world!"
    }

specify non null String parameter and following code :

fun callApi( str: String?) : String{
return "hello world!"
}

means a nullable string parameter. does this makes annotations for function arguements useless?

It makes

@NonNull

or

@Nullable

obsolete in kotlin code, yes. These things are backed into the Typesystem. https://kotlinlang.org/docs/reference/null-safety.html

okkkk, that clears a lot, thanks for your help...🙂