trying to create a method called hello with an argument i am not typing the right code please help ```

You pretty much had it, but you added extra stuff they didnt ask for. The challenges are very picky. Heres what I used:

def hello (a) end

Without knowing exactly what the program is asking for -

If you want to just define a method hello with one argument it is

def hello(arg)
end

If you want to add the number 2 to your argument

def hello(arg)
  arg + 2
end

Additionally - you are calling the add method with the argument of 2, but you are defining the hello method, add is not defined, so in this case it should be hello(2). You need to remember to call the correct method with the arguments.

Note: puts will result in a 'nil' value. puts simply displays the result to stdout and RETURNS a value of 'nil'. If you want to RETURN the value of arg + 2 you can use the return keyword, or simply write arg + 2 as ruby will automatically return the value of the last expression. To state again - puts will only display the value in the command line. While return will return the value.