Visas for Malaysia:
The Malaysian government has issued 3 types of visas to foreign nationals.
Single entry visa:
It is usually issued for the purpose of social visits. With this visa type, you can enter once because this visa allows only one entrance into the country and has a validation of maximum 3 months.
Multiple entry visas:
This type of visa is issued mainly for business or governmental purposes and its validation usually ranges from 3 to 12 months. To obtain this visa the applicant has to provide a valid return ticket and sufficient financial funds to cover his expenses during the stay.
Transit visa:
If the foreign national does not leave the airport while waiting for their connecting flight, a transit visa is of course not required. It aimed for travelers who only transit Malaysia on the way to another country.
Read More at http://www.visaworker.com/three-visa-types-to-enter-malaysia/