..^ is an operator. You can't put spaces in the middle of an operator. On Fri, 1 Jan 2021 at 22:13, ToddAndMargo via perl6-users < perl6-users@perl.org> wrote:
> >> On Fri, 1 Jan 2021 at 18:59, ToddAndMargo via perl6-users > >> <perl6-users@perl.org <mailto:perl6-users@perl.org>> wrote: > >> > >> >> ^ note: ^3 means the integer "just before" 3 (zero is > >> presume to be the > >> >> start point) > >> >> > >> >> 3^ means the integer "just after" 3 (an ending > >> point is > >> >> required) > >> >> > >> >> > >> > >> On 12/31/20 10:15 PM, Kevin Pye wrote: > >> > No, it does not. Go back and read what Brad wrote; he was quite > >> explicit. > >> > > >> > Nothing about the range 0 ..^ 3 (for which "^3" is just a > short-cut) > >> > says anything about integers. It is the range of numbers (real > >> numbers > >> > if you like) ranging from 0 to 3, but excluding 3. In standard > >> > mathematical notation that would be "[0,3)". If you iterate over > the > >> > range then you start with the beginning of the range and keep > >> adding one > >> > until you reach the end (in this case ignoring the final value if > >> it is > >> > equal to the end-point). > >> > > >> > If the range were 0.5 .. 3 then the iterated values would be 0.5, > >> 1.5 > >> > and 2.5. > >> > >> > >> Hi Kevin, > >> > >> My notes were for "for" loops. > >> > >> > for ^2 {print "$_\n";} > >> 0 > >> 1 > >> > >> > >> I am not able to reproduce your comments: > >> > >> > for ^2.1..2.5 {print "$_\n";} > >> Range objects are not valid endpoints for Ranges > >> in block <unit> at <unknown file> line 1 > >> > >> > for ^2.1 .. 2.5 {print "$_\n";} > >> Range objects are not valid endpoints for Ranges > >> in block <unit> at <unknown file> line 1 > >> > >> Would you mind throwing me an REPL example? > >> > >> Many thanks, > >> -T > > On 1/1/21 12:39 AM, Kevin Pye wrote: > > We have established that ^2.1 is a range, meaning all the real numbers > > from 0 to 2.1, not including the 2.1. > > > > What do you expect ^2.1 .. 2.5 to mean, That's a range (the "..") from > > "^2.1", another range to the number 2.5. You can't have a range starting > > with a range, A range is between two numbers. Hence the error message is > > quite correct. > > > > There are four infix operators which create ranges: "..", "^..", "..^" > > and "^..^" > > and the prefix operator "^:"; you're trying to mix two of them. > > > > All of those take numbers as their arguments, not ranges. > > > > Try something like > > > > .say for 2.1 .. 2.5 > > > > You can try > > .say for 2.1 ^.. 2.5 > > > .say for 2.1 .. 2.5 > 2.1 > > > > .say for 2.1 .. ^2.5 > Range objects are not valid endpoints for Ranges > in block <unit> at <unknown file> line 1 > > > > and then explain the output. > > Hi Kevin, > > I am trying to get it to work in a "for" loop. > > I am doing something wrong. > > Would you mind sending me the proper syntax > for this from REPL? > > -T > > > > >
