F

false -- if

file -- CrtFileHdlr, Eval, SplitPath, file, glob, open, pid, seek, source

file descriptor -- GetFile

file events -- Notifier

file handle -- GetOpnFl

file name -- Translate

file selection dialog -- getOpenFile

file type -- GetFile

filename -- SplitPath

fill -- GetJustify

filter -- RestrictEv

floating-point -- GetInt, PrintDbl

flush -- OpenFileChnl, flush, update

flushing -- fconfigure

focus -- CanvTkwin, CanvTxtInfo, CrtItemType, DrawFocHlt, focus, focusNext

focus model -- wm

font -- CanvPsY, ConfigWidg, FontId, GetFont, MeasureChar, TextLayout, font

for -- for

foreach -- foreach

form -- bind

format -- format, Clipboard, CrtSelHdlr, GetSelect, clipboard, selection

frame -- upvar, frame

free -- Alloc, DString, Interp, Preserve