thats so simple
just open your whatsapp like this
now open your friend's contact and click on attachment link like this
now a new options menu opensup
click on option "location" like this
now your current location will open in map and your current location will be indicated by blue circle or red arrow head pointer like this
NOTE= there is no need to ON GPS.
now click on top left icon on screen to zoom in your location like this
now your location will be zoom in with more details.
now press the option "send this location" like this
your location will be deliver in a text message and it will be look like this in chat.