| Return type | Name and parameters | 
|---|---|
                                             void
                                         | 
                                        
                                            downto(Number to, Closure closure)
                                            Iterates from this number down to the given number, inclusive, decrementing by one each time.  | 
                                    
                                             void
                                         | 
                                        
                                            upto(Number to, Closure closure)
                                            Iterates from this number up to the given number, inclusive, incrementing by one each time.  |