Lambda vs Proc

def lambda_test(x)
  lam = lambda { |x| puts "Square is #{x * x}"; return; puts "cube is #{x*x*x}" }
  lam.call x
  puts "Hello World in Lambda"
end

def proc_test(x)
  proc = Proc.new do |x|
  	  puts "Square is #{x * x}"
	  return
	  puts "cube is #{x*x*x}"
	end
  proc.call(x)
  puts "Hello Word in Proc"
end

lambda_test(4)

proc_test(5)