instance-variables

What does @@variable mean in Ruby?

A variable prefixed with @ is an instance variable, while one prefixed with @@ is a class variable. Check out the following example; its output is in the comments at the end of the puts lines: You can see that @@shared is shared between the classes; setting the value in an instance of one changes the value for all other instances of that class and … Read more

What is an instance variable in Java?

Instance variable is the variable declared inside a class, but outside a method: something like: Now this IronMan Class can be instantiated in another class to use these variables. Something like: This is how we use the instance variables. Shameless plug: This example was pulled from this free e-book here here.