age = prompt "How old are you?", 0

if age >= 18
  alert 'Adult'
else
  alert 'Under 18'

alert 'Under 15' if age < 15

if age < 16 then alert "Under age" else alert "Of age"

# Doesn't do what one would expect. At all. Look at the JS.
console.log ((age < 15) ? "Minor" : "Elder")