help to convert java to c# and advice on how to switch cam using 1/2/3 buttons to pick cam?

Ok first off here the JavaScript i like help with converting into c sharp

 var control : Vector3 = Vector3( Input.GetAxis( "Vertical" ) * forward, 1.0, -Input.GetAxis( "Horizontal" ) * sideways );

and then my 2nd question I like to add say 3 cams to my model and be able to access them via pressing 1,2 or 3 buttons how would i go about doing this?

cheers for the help