On any way, from Real World to Information Technology, is written: Parameters!
The universal formula for defining parameters is:
type  name  Name  Attributes; for example,
int  abc1234  any optional description;
'name', 'abc1234' are short names for internal relations of the parameters.
'Name' or 'Description' are long names for user interface.
For details you can visitHundreds of programming languages? Why not only one?