In other words, I want to check “the entered value by user” is existing in out database tag list (if yes then print TRUE)
How can I do it? Please give me logic with blocks
(if not understand, reply this mag or more clarification)
If thing is one of the elements of the list, returns true; otherwise, returns false. Note that if a list contains sublists,
the members of the sublists are not themselves members of the list.
For example, the members of the list (1 2 (3 4)) are 1, 2, and the list (3 4); 3 and 4 are not themselves members of the list.