StreamStyle is an option to StreamPlot, StreamDensityPlot, and related functions that determines the style to use for drawing streamlines.
StringCases["string", patt] gives a list of the substrings in " string" that match the string expression patt. StringCases["string", lhs -> rhs] gives a list of the values of ...
StringCount["string", " sub"] gives a count of the number of times " sub" appears as a substring of " string". StringCount["string", patt] gives the number of substrings in " ...
StringDrop["string", n] gives " string" with its first n characters dropped. StringDrop["string", -n] gives " string" with its last n characters dropped. StringDrop["string", ...
s_1 ~~ s_2 ~~ ... or StringExpression[s_1, s_2, ...] represents a sequence of strings and symbolic string objects s_i.
StringFormat["string"] attempts to determine what ImportString format could be used to import the string " string".
StringForm["controlstring", expr_1, ...] prints as the text of the controlstring, with the printed forms of the expr_i embedded.
StringFreeQ["string", patt] yields True if no substring in " string" matches the string expression patt, and yields False otherwise. StringFreeQ["string", {patt_1, patt_2, ...
StringInsert["string", " snew", n] yields a string with " snew" inserted starting at position n in " string". StringInsert["string", " snew", -n] inserts at position n from ...
"s_1" <> "s_2" <> ..., StringJoin["s_1", "s_2", ...], or StringJoin[{"s_1", "s_2", ...}] yields a string consisting of a concatenation of the s_i.