• ← NotOptionQ
• → OptionValue

OptionQ

WMA link

OptionQ[expr]

returns True if expr has the form of a valid option specification.

Examples of option specifications:

• • OptionQ[a -> True]

• • OptionQ[a :> True]

• • OptionQ[{a -> True}]

• • OptionQ[{a :> True}]

Options lists are flattened when are applied, so

• • OptionQ[{a -> True, {b->1, "c"->2}}]

• • OptionQ[{a -> True, {b->1, c}}]

• • OptionQ[{a -> True, F[b->1,c->2]}]

OptionQ returns False if its argument is not a valid option
specification:

• • OptionQ[x]