whynot.rb

def calc2(a, b)
	yield(a,b)
end

# this works
p calc2(5, 6) {|a,b| a+b}

# this works
calc2(5, 6) do |a, b|
	p a + b 
end

# this does not work
p calc2(5,6) do |a, b|
  a + b
  end