method is function??

Answer 1

In simple words, a method is a function that belongs to an object.
For more information study OOP concepts.

Answer 2

Yep ^^
The method is exactly a function but in classes, they're the owners of that "function". Just that class can call it.

Answer 3

Sébastien you are referring out good but I think you are losing out the concept it is object actually not class