Ruby - Method, Block, Soring

def prime(n)
  puts "That‘s not an integer." unless n.is_a? Integer
  is_prime = true
  for i in 2..n-1
    if n % i == 0
      is_prime = false
    end
  end
  if is_prime
    puts "#{n} is prime!"
  else
    puts "#{n} is not prime."
  end
end

prime(2)
prime(9)
prime(11)
prime(51)
prime(97)

def what_up(greeting, *bros)
  bros.each { |bro| puts "#{greeting}, #{bro}!" }
end
 
what_up("What up", "Justin", "Ben", "Kevin Sorbo")