# JavaScript String charCodeAt() Method

JavaScript String Reference

## Example

Return the Unicode of the first character in a string (the Unicode value for "H"):

var str = "HELLO WORLD";
var n = str.charCodeAt(0);

The result of n will be:

Try it yourself »

More "Try it Yourself" examples below.

## Definition and Usage

The charCodeAt() method returns the Unicode of the character at the specified index in a string.

The index of the first character is 0, the second character 1, and so on.

Tip: You can use the charCodeAt() method together with the length property to return the Unicode of the last character in a string. The index of the last character is -1, the second last character is -2, and so on (See Example below).

Tip: For more information about Unicode Character Sets, visit our HTML Character Sets reference.

## Browser Support

Method |  |  |  |  |
--- | --- | --- | --- | --- | ---
charCodeAt() | Yes | Yes | Yes | Yes | Yes

## Syntax

string.charCodeAt(index)

## Parameter Values

Parameter | Description
--- | ---
index | Required. A number representing the index of the character you want to return

## Technical Details

Return Value: | A Number, representing the unicode of the character at the specified index. Note: This method returns "NaN" if there is no character at the specified index, or if the index is less than "0".
JavaScript Version: | 1.2

## More Examples

## Example

Return the Unicode of the last character in a string (the Unicode value for "D"):

var str = "HELLO WORLD";
var n = str.charCodeAt(str.length-1);

The result of n will be:

Try it yourself »

JavaScript String Reference

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