Explain the error in the following sample of Ruby code. Reference the
line which the error is found on:
1- function effective_date(eff_date)
2- if eff_date.length < 3
3- eff_date = Time.now + (eff_date.to_i * 24 * 60 * 60)
4- return eff_date.strftime("%m%d%Y")
5- else
6- return eff_date
7- end
8- end