Dart: Getter & Setter

• It is used to retrieve a particular class field and save it in a variable. All classes have a default getter method but we can also create getter method as well. The getter method can be defined using the get keyword as:

    return_type get field_name{
        ...
    }
  

  It must be noted we have to define a return type but there is no need to define parameters in the above method.

Setter Method in Dart

It is used to set the data inside a variable received from the getter method. All classes have a default setter method but but we can also create getter method as well. The setter method can be defined using the set keyword as:

set field_name{
    ...
}

Example: Using the Getter and Setter method in the dart program.

class Mathematics
{
    int _numberOne = 0;
    int _numberTwo = 0;


// Setter Funtion 
void set setValueOne(int val)
{
  _numberOne = val *6;
}

void set setValueTwo(int val)
{
  _numberTwo= val * 6;

}

//getter function 

int get getValueOne =>_numberOne;
int get getValueTwo =>_numberTwo;

}

void main()
{

  var math = Mathematics();

        math.setValueOne = 01;  
        math.setValueTwo = 20;   
        print("Value One is : ${math.getValueOne}");  
        print("Value Two is : ${math.getValueTwo}");  

}