Ruby/Statement/break

loop do
  puts "Running..."
  print "Enter q to quit: "
  gets
  chomp
  break if $_ == "q"
end

block = Proc.new do |x|
  puts x
  break if x == 3
  puts x + 2
end
block.call(5)
# 5
# 7
block.call(3)
# 3
# LocalJumpError: break from proc-closure

def oscillator
  x = 1
  while true
    yield x
    x *= -2
  end
end
oscillator { |x| puts x; break if x.abs > 50; }

while(line = gets.chop)     
  break if line == "quit"   
  puts eval(line)
end
puts "Good bye"

1.upto(10) do |x|
  puts x
  break if x == 3
end
# 1
# 2
# 3