Many times, we enter numbers that identify a group of nodes, bar, elements, etc. in using the program.

Almost always, we may use the comma dash code to facilitate this action. We need only to remember that the comma means “and” and the dash is “up to“. In fact this code is used by many other computer programs.


1,5,8 means 1 and 5 and 8
1-4 means  from 1 up to 4 = 1,2,3,4
1-3,5,7-9 means from 1 up to 3 and 5 and from 7 up to 9 = 1,2,3,5,7,8,9