Fibonacci[n] gives the Fibonacci number F_n. Fibonacci[n, x] gives the Fibonacci polynomial F_n (x).
FieldHintStyle is an option for InputField that specifies the style to use for displaying the field hint.
FindList["file", " text"] gives a list of lines in the file that contain the specified string. FindList["file", {"text_1", "text_2", ...}] gives a list of all lines that ...
Find
(Built-in Mathematica Symbol) Find[stream, " text"] finds the first line in an input stream that contains the specified string. Find[stream, {"text_1", "text_2", ...}] finds the first line that contains ...
FiniteGroupData[name, " property"] gives the value of the specified property for the finite group specified by name.FiniteGroupData["class"] gives a list of finite groups in ...
For
(Built-in Mathematica Symbol) For[start, test, incr, body] executes start, then repeatedly evaluates body and incr until test fails to give True.
FourierCosCoefficient[expr, t, n] gives the n\[Null]^th coefficient in the Fourier cosine series expansion of expr.FourierCosCoefficient[expr, {t_1, t_2, ...}, {n_1, n_2, ...
FourierParameters is an option to Fourier and related functions that specifies the conventions to use in computing Fourier transforms.
FourierSinCoefficient[expr, t, n] gives the n\[Null]^th coefficient in the Fourier sine series expansion of expr.FourierSinCoefficient[expr, {t_1, t_2, ...}, {n_1, n_2, ...}] ...
FullDefinition[symbol] prints as the definitions given for symbol, and all symbols on which these depend.