Method Creation « Method « Ruby

1.Creating and Calling a Method
2.A simple definition for a method named hello, created with the keywords def and end
3.define methods that have arguments
4.You can a function with or without parenthesis
5.Call a function for a parameter with or without parenthesis
6.You can call another function based on the return from this funtion call
7.method with ?
8.Define a method to convert Cartesian (x,y) coordinates to Polar
9.Add a new method by add method to Class