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Marc Georges1,685 Points
I know that append takes exactly one argument. So what is the difference between an argument and parameter?
Jason AndersTreehouse Moderator 145,540 Points
In short, a parameter is what a method accepts (or is expecting), and an argument is what is passed into the method when it is called.
You call it a parameter when inside the function and an argument when outside the function.
Also, parameter is a variable and argument is the value you assign to the variable.