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JavaScript charCodeAt() Method
JavaScript String Object
Definition and Usage
The charCodeAt() method returns the Unicode of the character at the specified index in a string.
The index of the first character is 0, and the index of the last character in a string called "txt", is txt.length-1.
Syntax
string.charCodeAt(index)
| Parameter | Description |
|---|---|
| index | Required. An integer between 0 and string.length-1 |
Browser Support
The charCodeAt() method is supported in all major browsers.
Example
Example
Return the Unicode of the first and last character in a string:
<script type="text/javascript">
var str = "Hello world!";
document.write("First character: " + str.charCodeAt(0) + "<br />");
document.write("Last character: " + str.charCodeAt(str.length-1));
</script>
var str = "Hello world!";
document.write("First character: " + str.charCodeAt(0) + "<br />");
document.write("Last character: " + str.charCodeAt(str.length-1));
</script>
The output of the code above will be:
First character: 72
Last character: 33
Last character: 33
Try it yourself »
JavaScript String Object
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Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.