> my Rat @example =  1 , * ** 0.9999 ... Inf;
[...]
> @example[^4]
Type check failed in assignment to @example; expected Rat but got Int
  in block <unit> at <unknown file>:1

##</code><code>##

> my Rat @example =  1.0, * ** 0.9999 ... Inf;
[...]
> @example[^4]
Type check failed in assignment to @example; expected Rat but got Num
  in block <unit> at <unknown file>:1

> @example[0]
1

##</code><code>##

> my Rat @example =  1.0, * += 0.9999 ... Inf;
[...]
> @example[^4]
(1 1.9999 2.9998 3.9997)