Instance methods in Dart :
In simple words, instance methods are methods defined in a class those are available with class objects. Instance methods can access to instance variables and this. For example, let’s consider the below program :
class Student {
final String name;
final num age;
const Student(this.name, this.age);
bool isAgeEven() {
return age % 2 == 0;
}
}
main() {
var alex = Student("Bob", 30);
print("isEven : ${alex.isAgeEven()}");
}
Here, isAgeEven is an instance method to check if the age of a Student is even or not. It returns one boolean value.
Using getter and setter methods :
Getter and Setter methods are used to get or read variables and set or write variables. These methods are written using get and set keywords.
class Student {
final String name;
num age;
Student(this.name);
set setAge(num age) => this.age = age;
num get getAge => this.age;
}
main() {
var alex = Student("Bob");
alex.setAge = 10;
print("Age : ${alex.getAge}");
}
Each instance variables has an implicit getter and setter. You can use . to get/set one instance variable.
