JavaScript String charAt()

Definition and usage

charAt() The method returns the character at the specified index (subscript) in the string.

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

The index of the last character is string length - 1 (see the example below the page).

See also:

charAt() method

Instance

Example 1

Get the first character in the string:

let text = "HELLO WORLD";
let letter = text.charAt(0);

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Example 2

Get the second character in the string:

let text = "HELLO WORLD";
let letter = text.charAt(1);

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Example 3

Get the last character in the string:

let text = "HELLO WORLD";
let letter = text.charAt(text.length-1);

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Example 4

Index out of range returns an empty string:

let text = "HELLO WORLD";
let letter = text.charAt(15);

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Example 5

The default index is 0:

let text = "HELLO WORLD";
let letter = text.charAt();

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Example 6

Invalid index is converted to 0:

let text = "HELLO WORLD";
let letter = text.charAt(3.14);

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Syntax

string.charAt(n)

Parameter

Parameter Description
n Required. Number. The index (subscript) of the character.

Return value

Type Description
String

Specifies the character at the index.

If the index is invalid, it returns an empty string ("").

Description

If the parameter n Not between 0 and stringIf the index is between .length-1, this method returns an empty string.

Note:JavaScript does not have a character data type different from string types, so the returned character is a string of length 1.

Browser support

charAt() It is an ECMAScript1 (ES1) feature.

All browsers fully support ES1 (JavaScript 1997):

Chrome IE Edge Firefox Safari Opera
Chrome IE Edge Firefox Safari Opera
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صفحات مرتبط

رشته JavaScript

روش‌های رشته JavaScript

جستجوی رشته JavaScript