The following functions perform operations that are related to
strings.
12.3.1 String Concatenation
12.3.2 Symbol Concatenation
12.3.3 Taking a String Apart
12.3.4 Searching a String
12.3.5 Evaluating a Function within a String
12.3.6 Evaluating a Construct within a String
12.3.7 Converting a String to Uppercase
12.3.8 Converting a String to Lowercase
12.3.9 Comparing Two Strings
12.3.10 Determining the Length of a String