TypeScript String charAt()
Syntax & Examples

String.charAt() method

The `charAt()` method of a String object returns the character at a specified index. If the specified index is out of range, it returns an empty string.

Syntax of String.charAt()

The syntax of String.charAt() method is:

charAt(pos: number): string

This charAt() method of String returns the character located at the given index in a string. The index is zero-based, meaning the first character is at index 0, the second at index 1, and so on. If the specified index is less than 0 or greater than or equal to the string's length, an empty string is returned.

Parameters

ParameterOptional/RequiredDescription
posrequiredThe zero-based index of the character to return. Must be an integer.

Return Type

String.charAt() returns value of type string.


✐ Examples

1 Using charAt() to retrieve a character

You can use the `charAt()` method to retrieve a character from a string at a specific index.

For example,

  1. Define a string variable str with some text.
  2. Call the charAt() method on the string with the desired index.
  3. Store the returned character in a variable or use it directly in your logic.
  4. Log the character to the console using the console.log() method.

TypeScript Program

const str = 'Hello, World!';
const char = str.charAt(7);
console.log(char);

Output

W

2 Using charAt() with an out-of-range index

If you call `charAt()` with an index that is out of the string's range, it will return an empty string.

For example,

  1. Define a string variable str with some text.
  2. Call the charAt() method on the string with an out-of-range index.
  3. Log the result to the console using the console.log() method.

TypeScript Program

const str = 'Hello';
const char = str.charAt(10);
console.log(char);

Output


3  Using charAt() in a loop
You can use the `charAt()` method in a loop to access each character in a string.
For example,
  1. Define a string variable str with some text.
  2. Use a for loop to iterate through the string based on its length.
  3. Call the charAt() method with the current index to retrieve each character.
  4. Log each character to the console using the console.log() method.
TypeScript Program
const str = 'Hello';
for (let i = 0; i < str.length; i++) {
  console.log(str.charAt(i));
}
      
Output
H
E
L
L
O

Summary
In this TypeScript tutorial, we learned about charAt() method of String: the syntax and few working examples with output and detailed explanation for each example.