Additionally, a string may be enclosed by triple quotes. In this case, all escape sequences are ignored, including double quotation mark characters. To specify a string that contains an embedded quoted string, you can either use a verbatim string or a triple-quoted string. If you use a verbatim string, you must specify two quotation mark characters to indicate a single quotation mark character. If you use a triple-quoted string, you can use the single quotation mark characters without them being parsed as the end of the string. This technique can be useful when you work with XML or other structures that include embedded quotation marks.
// Using a verbatim string
let xmlFragment1 = @"<book author=""Milton, John"" title=""Paradise Lost"">"
// Using a triple-quoted string
let xmlFragment2 = """<book author="Milton, John" title="Paradise Lost">"""
In code, strings that have line breaks are accepted and the line breaks are interpreted literally as newlines, unless a backslash character is the last character before the line break. Leading white space on the next line is ignored when the backslash character is used. The following code produces a string str1 that has value "abc\ndef" and a string str2 that has value "abcdef".
let str1 = "abc
def"
let str2 = "abc\
def"
