/*There are three definition of an interface-

* Def 1-any Service Requirement Specification (SRS) is called interface.

* Def 2-interface acts a contract between client and service provide.(eg- Customer->GUI<-Bank)

* Def 3-inside interface every method is always abstract whether we are declaring or not,

* hence interface is considered as 100% pure abstract class.

*/

//if a class is declared as interface then by default access modifier is public rather than default.

//if we declare a class as interface than we dont need to use class keyword

interface IBank

{

//100% abstraction

//services

/*public*/ void deposit(); //by default access modifier is "public" for interface class

/*public*/ void checkBalance(); //by default every method of an interface is "abstract" so we not need to write it

/*public*/ int withdraw();

}

public class FirstCode {

public static void main(String[] args) {

// TODO Auto-generated method stub

}

}

/*

* Summary:- interface corresponds to service requirement specification(SRS) or contract between client and service provider

* or 100% pure abstraction or abstract class.

*/