Anyone can comment this ruby code? [closed]

Answer 1

The code iterates and prints all values from 0 to 0xFFFFFFFFFF Similar to how

(1..10).each do |i|
  puts i
end

iterates and prints all values from 1 to 10.

For each value between 0 and 0xFFFFFFFFFF it simply prints out its current hex value:

0000000000
       ...
0000005E6A
0000005E6B
0000005E6C
0000005E6D
0000005E6E
0000005E6F
       ...
FFFFFFFFFF