$q,$

is a logical function that returns a user$-$defined value if the condition is true and another user$-$defined value if the condition is false.

IF$($condition$,$ value if true, value if false$)$

OR$($condition $1,$ condition $2$dots $)$

AND$($condition $1,$ condition $2...)$

TO$($value if true, value if false$)$