neg (negative function)
The function neg negates its argument, e.g. neg 3 is -3. This is needed in q because it has no ambivalence, and - is already in use as a verb (i.e. takes arguments to left and right).
Applies to all data types except sym and char. Applies item-wise to lists, dict values and table columns.
q)neg -1 0 1 2 1 0 -1 -2
For a complete list of functions, see the kdb+ Function Reference.