What is Kotlin backi...

In Kotlin, a backing field is an implicit field that is automatically generated by the compiler for properties that require storage for their values[1][2]. It is used to hold the actual value of the property in memory.

Backing fields are used in the following cases[1]:

• When a property has a custom getter or setter defined
• When a property is annotated with @JvmField
• When a property is declared as a top-level property

For example, consider the following Kotlin code:

var counter = 0
  set(value) {
    if (value >= 0) 
      field = value
  }

Here, field is a keyword that refers to the backing field of the counter property[2]. It allows you to access and modify the property's value within the custom set...