The Data class is a simple class that holds data and PROVIDES typical functions. To declare a class as a data class, use the data keyword. 

Syntax:

The following functions are automatically derived by the COMPILER for the data classes:

• equals() - The equals() function returns true if two objects have the identical CONTENTS. It operates similarly to "==," ALTHOUGH for Float and Double values it works differently.
• hashCode() - The hashCode() function returns the object's hashcode value.
• copy() - The copy() function is used to DUPLICATE an object, changing only a few of its characteristics while leaving the rest unaltered.
• toString() - This function returns a string containing all of the data class's parameters.

To ensure consistency, data classes must meet the following requirements:

• At least one parameter is required for the primary constructor.
• val or var must be used for all primary constructor parameters.
• Abstract, open, sealed, or inner data classes are not possible.
• Only interfaces may be implemented by data classes.

Example:

The above code snippet creates a data class Sample with two parameters.

Here, we create an instance of the data class Sample and pass the parameters to it.

Output:-