Question

what are the rules for nomenclature of alkanes

Answer 1

In general, the base part of the name reflects the number of carbons in what you have assigned to be the parent chain.

Answer 2

see its simple

1. in the general formula remove the last e and put in the  name of the functional group
2. name it based on the number of carbon atoms in it
3. and finally alkanes are saturated hydrocarbons