How to check if string include symbols?

i have a question: How i can check if a string include symbol? It's looking confusing to me:

class Beba 
def initialize
while true
puts "Qfar emri deshironi ti vnoni bebes?"
 @@emri = gets.chomp.capitalize
  if @@emri.scan(/\d+/).empty? && @@emri.scan(/\/./).empty?
    puts "Ti e emertove beben me emrin: #{@@emri}"
 break 
 else
   puts "Emri nuk mund te jete me numra/simbole, provoni perseri."
end
end
end 
end

As you can see, at if@@emri.scan(/\d+/).empty? && @@emri.scan(/\/./).empty?, i don't know what to do, like which method i can use for @@emri.scan(/\\.\).empty? to check if don't include any symbol. Thank you.