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Web Programming
Notes “This is a string”
‘This is another string’
“This is also ‘a string’ “
This is “a string”’
An empty set of quotes is called the null string. If a number is enclosed in quotes, it is considered
a string; e.g., “5” is a string, whereas 5 is a number.
Strings are called constants or literals. The string value “hello” is called a string constant or
literal.
Notes To change a string requires replacing it with another string.
Strings can contain escape sequences (a single character preceded with a backslash), as shown in
Table 5.2. Escape sequences are a mechanism for quoting a single character.
Table 5.2: Escape Sequences
Escape Sequence What It Represents
\’ Single quotation mark
\” Double quotation mark
\t Tab
\n Newline
\r Return
\f Form feed
\b Backspace
\e Escape
\\ Backslash
Special Escape Sequences
\XXX The character with the Latin-1 encoding specified by up to
three octal digits XXX between 0 and 377. \251 is the octal
sequence for the copyright symbol.
\xXX The character with the Latin-1 encoding specified by the
two hexadecimal digits XX between 00 and FF. \xA9 is the
hexadecimal sequence for the copyright symbol.
\uXXXX The Unicode character specified by the four hexadecimal
digits XXXX. \u00A9 is the Unicode sequence for the
copyright symbol.
Example: Illustrating strings in java script.
<html>
<head>
<body>
136 LOVELY PROFESSIONAL UNIVERSITY
