Description:
This method returns a number indicating the Unicode value of the character at the given index.
Unicode code points range from 0 to 1,114,111. The first 128 Unicode code points are a direct match of the ASCII character encoding. The charCodeAt() will always return a value that is less than 65,536.
Syntax:
string.charCodeAt(index); |
Here is the detail of parameters:
- index: An integer between 0 and 1 less than the length of the string; if unspecified, defaults to 0.
Return Value:
Returns a number indicating the Unicode value of the character at the given index. This returns NaN if the given index is not between 0 and 1 less than the length of the string.
Example:
<html>
<head>
<title>JavaScript String charCodeAt() Method</title>
</head>
<body>
<script type="text/javascript">
var str = new String( "This is string" );
document.write("str.charCodeAt(0) is:" + str.charCodeAt(0));
document.write("<br />str.charCodeAt(1) is:" + str.charCodeAt(1));
document.write("<br />str.charCodeAt(2) is:" + str.charCodeAt(2));
document.write("<br />str.charCodeAt(3) is:" + str.charCodeAt(3));
document.write("<br />str.charCodeAt(4) is:" + str.charCodeAt(4));
document.write("<br />str.charCodeAt(5) is:" + str.charCodeAt(5));
</script>
</body>
</html>
|
This will produce following result:
str.charCodeAt(0) is:84 str.charCodeAt(1) is:104 str.charCodeAt(2) is:105 str.charCodeAt(3) is:115 str.charCodeAt(4) is:32 str.charCodeAt(5) is:105 |
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