Semantically identical code, three idiomatic ways of expressing it

hanging_if_expression.rb

# Coders from from C often like this style:
log status == OK ? "OK" : "PROBLEM"
log "All done."

# But since if returns a value in ruby, you can spell it out:
log if status == OK
  "OK"
else
  "PROBLEM"
end
log "All done."

# I favor this style, because it pushes the whole expression out and preserves the vertical registration of if/else/end
log if status == OK
      "OK"
    else
      "PROBLEM"
    end
log "All done."

If we're still doing Ruby you don't need any of those semicolons:

puts(if status==OK then "OK" else "PROBLEM" end)

works just fine.