Challenge 3: for vs .each — Solution

# for loop version
for n in 1..5
  puts n
end

# .each version -- the idiomatic Ruby choice
(1..5).each do |n|
  puts n
end

=begin
Output (both loops print the same thing):
1
2
3
4
5
1
2
3
4
5

Notes:
- Both versions produce identical output, but .each is the idiomatic Ruby
  choice. The for loop's variable (n) leaks into the surrounding scope and
  is still accessible after the loop ends; .each's block variable (n) stays
  cleanly scoped to the block and disappears once the block finishes.
- (1..5) is a Range object, and .each is a method being called on it with
  a block — this is the same do...end block syntax used for arrays and
  hashes, which is part of why idiomatic Ruby favors it: one consistent
  iteration style across every collection type.
=end