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Kotlin program | Example of Various Visibility Modifiers on Package Level

Kotlin | Example of Various Visibility Modifiers: Here, we are implementing a Kotlin program to demonstrate the example of Example of various visibility modifiers on package level.
Submitted by IncludeHelp, on June 13, 2020

Various Visibility Modifiers on Package Level

• Visibility modifiers are that set the accessibility (visibility) of Classes, objects, interfaces, constructors, functions, properties, and their setters.
• There are four types of visibility modifiers,
  1. Public
  2. Private
  3. Protected
  4. Internal
• Getters always have the same visibility as the properties.
• Visibility Modifiers inside Packages:
  Functions, properties, and classes, objects and interfaces can be declared on the "top-level", i.e. directly inside a package,
  1. public: Visible everywhere, The default visibility, if there is not an explicit modifier
  2. private: Visible inside the file containing the declaration.
  3. internal: Visible everywhere with the same module.
  4. protected: Not available for top-level declaration.
• Local variables, functions, and classes can not have visibility modifiers.
• To specify the visibility of the primary constructor of a class, use the following syntax (by default constructors are public),

  class C private constructor(a: Int) { ... }
  

Program to demonstrate the example of Example of various visibility modifiers on package level in Kotlin

package com.includehelp

// Public by default, visible to everywhere
fun fun1(){
    // local variable can not have visibility
    var a=5
    println("Inside Fun1 $a")
}

// private , visible inside Containing file
// VisibilityModifiersInsidePackages.kt
private fun fun2(){
    println("Inside Fun2")
}

// internal , visible inside same module
internal fun fun3(){
    println("Inside Fun3")
}

// public by default visible everywhere
var name="IncludeHelp"

// by default public, visible every where
class MyClass

// Main function, Entry point of program
fun main(){
    // call function
    fun1()

    // call function
    fun2()

    // call function
    fun3()

    //Access variable
    println("Name : $name")
}

Output:

Inside Fun1 5
Inside Fun2
Inside Fun3
Name : IncludeHelp