JavaScript length Property
JavaScript String Object
Definition and Usage
The length property returns the length of a string (in characters).
Syntax
Browser Support

The length property is supported in all major browsers.
Example
Example
Return the number of characters in a string:
<script type="text/javascript">
var txt = "Hello World!";
document.write(txt.length);
</script>
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The output of the code above will be:
Try it yourself »
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JavaScript String Object
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