JavaScript toUpperCase() Method
 JavaScript String Object
Definition and Usage
The toUpperCase() method converts a string to uppercase letters.
Syntax
Browser Support
The toUpperCase() method is supported in all major browsers.
Example
Example
Convert a string to uppercase letters:
<script type="text/javascript">
var str="Hello world!";
document.write(str.toUpperCase());
</script>
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Try it yourself »
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JavaScript String Object
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