Data flow programming language is based on the flow of data to specify the program. In this programming language computation is modelled as directed graph, the node of which are either data sources or processing elements which compute some function. There are variety of data flow language like Clarion Programming Language, Clipper Programming Language, MUMPS Programming Language etc.
? "Hey!! How R U??"
A simple data base input mask:
USE Student SHARED NEW
@ 1, 0 SAY "StudentNam" GET Student->StudentNam PICT "999999" VALID Student->StudentNam > 0
@ 3, 0 SAY "Contact" GET Student->Contact VALID !empty(Student->Contact)
@ 4, 0 SAY "Address" GET Student->Address