if we want to allow code outside the class to change the value of an instance variable
Getters and setters are typically named using the following conventions: * Getters start with the word "get" followed by the name of the variable. * Setters start with the word "set" followed by the name of the variable. For example, if you have a private variable named "name", you would create a getter method named "getName()" and a setter method named "setName()".