#   
## Overview

The **`isLetterOrDigit()` method** is a static method in the `Character` class in Java, which is used to determine if the specified character is a letter or digit.

A character is determined a letter or a digit when either of the [Character.isLetter()](https://www.educative.io/answers/what-is-characterisletter-in-java) or [Character.isDigit()](https://www.educative.io/answers/what-is-characterisdigit-in-java) methods return `true`. 

#   
## Syntax

```
public static boolean isLetterOrDigit(char ch)
```

#   
## Parameters

`char ch` - The character to be checked for letter or digit.


#   
## Return value

The `isLetterOrDigit()` function returns `true` if the character sent as a parameter is a letter or a digit; otherwise, it returns `false`.

#   
## Example

In the code below, we test the function against letters, digits and special characters.

public class Main{

    public static void main(String[] args){
        System.out.println(Character.isLetterOrDigit('a'));
        System.out.println(Character.isLetterOrDigit('1'));
        System.out.println(Character.isLetterOrDigit('9'));
        System.out.println(Character.isLetterOrDigit('Z'));
        System.out.println(Character.isLetterOrDigit('.'));
        System.out.println(Character.isLetterOrDigit('!'));
    }
}


What is Character.isLetterOrDigit() in Java?

Determines if a character is a letter or digit. Returns true for letters or digits, false otherwise.