Flatten
(Built-in Mathematica Symbol) Flatten[list] flattens out nested lists. Flatten[list, n] flattens to level n. Flatten[list, n, h] flattens subexpressions with head h. Flatten[list, {{s_11, s_12, ...}, ...
FlipView[{expr_1, expr_2}] represents an object which flips between displaying expr_1 and expr_2 each time it is clicked.FlipView[{expr_1, expr_2, ...}] cyclically flips ...
Floor
(Built-in Mathematica Symbol) Floor[x] gives the greatest integer less than or equal to x. Floor[x, a] gives the greatest multiple of a less than or equal to x.
FoldList[f, x, {a, b, ...}] gives {x, f[x, a], f[f[x, a], b], ...}.
Fold
(Built-in Mathematica Symbol) Fold[f, x, list] gives the last element of FoldList[f, x, list].
FontColor is an option for Style, Cell, and related constructs that specifies the default color in which to render text.
FontFamily is an option for Style and Cell that specifies the font family in which text should be rendered.
FontProperties -> {opt_1 -> val_1, opt_2 -> val_2} specifies font properties.
FontSize is an option for Style and Cell that specifies the default size in printer's points of the font in which to render text.
FontSlant is an option for Style, Cell, and related constructs that specifies how slanted characters in text should be.