What is the difference between "Explicitly" and "Implicitly" in programming language?

Question

I would like to have a clear and precise understanding of the difference between the two.

Also is the this keyword used to implicitly reference or explicitly ? This is also why I want clarification between the two?

I assume to use the this keyword is to reference implicitly (being something withing the class) whilst explicitly (is something not belonging to the class itself) like a parameter variable being passed into a method.

Of course my assumptions could obviously be wrong which is why I'm here asking for clarification.

Answer 1

Explicit means done by the programmer. Implicit means done by the JVM or the tool , not the Programmer.

For Example: Java will provide us default constructor implicitly.Even if the programmer didn't write code for constructor, he can call default constructor.

Explicit is opposite to this , ie. programmer has to write .

Answer 2

already you have got your answer but I would like to add few more.

Implicit: which is already available into your programming language like methods, classes , dataTypes etc.

-implicit code resolve the difficulties of programmer and save the time of development.

-it provides optimised code. and so on.

Explicit: which is created by the programmer(you) as per their(your) requirement, like your app class, method like getName(), setName() etc.

finally in simple way, A pre-defined code which provides help to programmer to build their app,programs etc it is know as implicit, and which have been written by the (you)programmer to full fill the requirement it is known as Explicit.