Introduction to groovy 1) duck typing 2) return is optional, last statement will be taken

introduction3.groovy

class Person {
    def name    //duck typing
    def age
    
    def getName() {    //override default getter
        "will not be printed"
        "my name is ${name}"    //return is optional, last statement is taken
    }
}
person = new Person(name:"goku")

println "hello " + person.name
assert "hello " + person.name == "hello my name is goku" 
assert "hello " + person.name == "hello ${person.name}"