2.2.3.2.20.3 STRING Data Type
This data type is represented by double quotation marks (""). A STRING can include any character except the double quotation marks. However, a double quotation mark can be represented by using a backslash ("\"). For example, the string "ab\"cd" is rendered as "ab"cd".
The backslash, also referred to as the escape character, can represent a newline character when it is placed before the letter n, as in "\n". The escape character itself can be represented with two backslashes ("\\"). If the escape character is followed by any character other than n, ", or \, the pair of characters is replaced with the character that follows the backslash. For example, "\a" is equivalent to "a".