What is Character.isLetter() in JAVA?

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.

Figure 1: Visual representation of the isLetter() function

Syntax

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'));
    }
}

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