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

Figure 1 shows a visual representation of the `isLetter()` function.

# Syntax
```java
boolean isLetter(char character)
```
# Parameter
The `isLetter()` function takes the character as a parameter.

# Return value
The `isLetter()` function returns `true` if the character sent as a parameter is `letter`; otherwise, it returns `false`.  

# Code





class JAVA {
    public static void main( String args[] ) {
        //simple letter
        System.out.println("Character.isLetter('E'):");
        System.out.println(Character.isLetter('E'));

        //other character
        System.out.println("Character.isLetter('*'):");
        System.out.println(Character.isLetter('*'));

        //digit character
        System.out.println("Character.isLetter('5'):");
        System.out.println(Character.isLetter('5'));

    }
}

What is Character.isLetter() in JAVA?

The `isLetter()` function checks if a character is a letter, returning true for letters and false otherwise.