On 12/30/20 5:39 PM, ToddAndMargo via perl6-users wrote:
Hi All,
In the following for loop:
for ^$nCount -> $i {
What is the ^ doing?
Confused again,
-T
With wonderful explanations for many others, my notes:
^ 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)
Looping using an integer (avoids having to use a C loop):
# loop to "just before" $x starting at 0 by 1
> my $x=3; for ^$x -> $i { print "i = $i\n"; }
i = 0
i = 1
i = 2
# loop from 3 to 5 by 1
> for 3..5 -> $i { print "i = $i\n"; }
i = 3
i = 4
i = 5
# loop from 3 to "just before" 6 by 1
> for 3..^6 -> $i { print "i = $i\n"; }
i = 3
i = 4
i = 5
# loop from "just after" 3 to 6 by 1
> for 3^..6 -> $i { print "i = $i\n"; }
i = 4
i = 5
i = 6
# loop from "just after" 3 to "just before" 7 by 1
> for 3^..^7 -> $i { print "i = $i\n"; }
i = 4
i = 5
i = 6
