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JavaScript substr() Method
JavaScript String Object
Definition and Usage
The substr() method extracts the characters from a string, beginning at "start" and through the specified number of character, and returns the new sub string.
Syntax
string.substr(start,length)
| Parameter | Description |
|---|---|
| start | Required. The index where to start the extraction. First character is at index 0 |
| length | Optional. The number of characters to extract. If omitted, it extracts the rest of the string |
Browser Support
The substr() method is supported in all major browsers.
Tips and Notes
Tip: To extract characters from the end of the string, use a negative start number (This does not work in IE).
Example
Example
Extract characters from a string:
<script type="text/javascript">
var str="Hello world!";
document.write(str.substr(3)+"<br />");
document.write(str.substr(3,4));
</script>
var str="Hello world!";
document.write(str.substr(3)+"<br />");
document.write(str.substr(3,4));
</script>
The output of the code above will be:
lo world!
lo w
lo w
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.