final and const keywords | Kotlin

final and const keywords | Kotlin

final

• Is a modifier in Kotlin that can be applied to a class, function, or property, enforce encapsulation.
• A class with final cannot be subclassed.
• Applied to function or property those cannot be overridden.
• Default modifier.

class Button { }

const

• Declare a constant value, cannot be changed at runtime.
• Constant must be a primitive type (Byte, Short, Int, Long, Float, Double, Boolean, Char) or String (first-class citizen).
• Constants are defined using the “const” keyword followed by the “val” keyword.

const val = 3.141592

The val keyword in Kotlin is used to declare a variable that is assigned a value when it is created and cannot be reassigned afterwards.

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