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