One or more characters surrounded by double quotes,
as in "xyz".
Initialized with the characters contained in the double quotes.
Have static storage duration and type ``array of characters.''
Escape sequences
may also be used in string literals.
A double quote within the string must be escaped with a backslash.
New-line characters are not valid within a string.
Adjacent string literals are concatenated into a single string.
A null character, \0,
is appended to the result of the concatenation, if any.
String literals are also known as ``string constants.''