fn test(): Number
   1000
end

print test() #=> 1000

fn printer(n: Number): Number
  print n
end

printer(1000) # => 1000
printer(98 / 2) # => 49

fn add(a: Number, b: Number): Number
   a + b
end

print add(1002, -1000) # => 2
print add(99, 1) # => 100