Include a Quote Character in a String
By Stephen Bucaro
To declare a variable as type String in Java Script requires that you
enclose the data within quotes. But what if you want to include quotes within
the string? You can easily include single quotes within a string by
enclosing the string in double quotes, as shown below.
var aStr = "John said, 'Java Script is fun to use'";
You can include double quotes within a string by enclosing the string in
single quotes, as shown below.
var aStr = 'John said, "Java Script is fun to use"';
But what if you want to use Java Script to display the message shown below?
John said, "enclose a sting in quotes like this: "string text""
You can't just alternate single and double quotes as shown below.
aStr = "John said, 'enclose a sting in quotes like this: "string text"'";
Since a double quote marks the beginning of the string, Java Script will
assume that next double quote character it encounters marks the end of
the sting. Finding a character, other than a ; after the next double
quote, will cause Java Script to generate an error.
In the situation where you need to use more than two levels of quotes, you can
escape quote characters by placing a backslash character in front
of the quote character, as shown below.
aStr = "John said, 'enclose a sting in quotes like this: \"string text\"'";
When Java Script encounters a backslash in a string, it considers the
backslash and the character immediately following the backslash
to be an escape sequence. An escape sequence provides special
instructions to the interpreter.
An escape sequence does not always instruct the interpreter to display
the character immediately following the backslash, for example the escape
sequence \t causes a tab space to be placed in the string. The escape
sequence \n causes the part of the string after it to be placed on a new line.
what if you want to include a backslash character in a string as shown below?
aStr = "To escape a quote, preceded it with a backslash, like this \"";