Logical OR. Produces a 0 result if both operands are zero, 1 otherwise. Valid for boolean and numeric (integers or floating-point) operands only. Typed with the Shift + \ keys also called the 'pipe' symbol (double pipe).
An example of a logical OR is:
if {[GETVAL %ATMHOUR]==4 || [GETVAL %ATMHOUR]==16} then {
SETVAL TAG1=[GETVAL TAG2]
}