The member and contains commands determine whether or not an object is in a list; the difference between them is the order of the arguments (required for compatibility reasons).
| member(2,[0,1,2,3,4,2]) |
or:
| member(2,%{0,1,2,3,4,2%}) |
or:
| contains([0,1,2,3,4,2],2) |
or:
| contains(%{0,1,2,3,4,2%},2) |
|