Create a method called "hello" that takes one argument.

Hi, Sinan the Thinker:

You haven't defined a valid ruby method. You must define a method properly and immediately declare the arguments right after the name

Declaring a method properly in Ruby

You must end your method definition with end.

If you want to do a oneliner, you must end your statements with ; explicitly to then end it with an end to finish your method definition.

Argument

Ruby has a variety of ways of explaining what arguments your method expects, but perhaps the easiest to add them directly after the name of the method *without *characters usually associated with operators as you have such as =:

By convention, you do so with a set of parentheses to mimic other languages that are more struct, but they're optional:

def hello(argument1) 
  puts argument 1
end

# The following method below is the same thing
def hello argument1
  puts argument1
end

I hope this helps!