JavaScript String toUpperCase() Method

JavaScript String Reference JavaScript String Reference

Example

Convert the string to uppercase letters:

var str = "Hello World!";
var res = str.toUpperCase();

The result of res will be:

HELLO WORLD!

Try it yourself »

Definition and Usage

The toUpperCase() method converts a string to uppercase letters.

Note: The toUpperCase() method does not change the original string.

Tip: Use the toLowerCase() method to convert a string to lowercase letters.


Browser Support

Method
toUpperCase() Yes Yes Yes Yes Yes

Syntax

string.toUpperCase()

Parameters

None.

Technical Details

Return Value: A String, representing the value of a string converted to uppercase
JavaScript Version: 1.0

JavaScript String Reference JavaScript String Reference

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