Challenge 1: Modifier if/unless — Solution

stock = 15
puts "In stock" if stock > 10
puts "Reorder soon" unless stock > 10

stock = 5
puts "In stock" if stock > 10
puts "Reorder soon" unless stock > 10

=begin
Output:
In stock
Reorder soon

Notes:
- With stock = 15: "In stock" if stock > 10 prints, because the condition
  is true. "Reorder soon" unless stock > 10 does NOT print, because unless
  only runs when its condition is falsy, and stock > 10 is true here.
- With stock = 5: the opposite happens — "In stock" is skipped and
  "Reorder soon" prints.
- The modifier form reads almost like plain English and is idiomatic Ruby
  for single-statement conditionals — you'd reach for a full if/end block
  only once there's more than one statement to run conditionally.
=end