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JavaScript substr() Method
Example
Extract parts of a string:
var str="Hello world!";
var n=str.substr(2,3)
var n=str.substr(2,3)
The result of n will be:
llo
Try it yourself »
Definition and Usage
The substr() method extracts parts of a string, beginning at the character at the specified position, and returns the specified number of characters.
Tip: To extract characters from the end of the string, use a negative start number (This does not work in IE 8 and earlier).
Note: The substr() method does not change the original string.
Browser Support
The substr() method is supported in all major browsers.
Syntax
string.substr(start,length)
Parameter Values
| Parameter | Description |
|---|---|
| start | Required. The position 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 |
Return Value
| Type | Description |
|---|---|
| String | A new string containing the extracted part of the text |
Technical Details
| JavaScript Version: | 1.0 |
|---|
More Examples
Example
Begin the extraction at position 2, and extract the rest of the string:
var str="Hello world!";
var n=str.substr(2)
var n=str.substr(2)
The result of n will be:
llo world!
Try it yourself »
JavaScript String Object
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