Java Program to Check Whether a Character is Alphabet or Not

In this article, we will understand how to check whether a character is alphabet or not. This is accomplished by checking if the given character lies in between the alphabets a to z or A to Z.

Below is a demonstration of the same −

Input

Suppose our input is −

Enter a character: H

Output

The desired output would be −

The character H is an alphabet

Algorithm

Step 1 - START
Step 2 - Declare a character value namely my_input
Step 3 - Read the required values from the user/ define the values
Step 4 - Using an if-else condition, check if the input value lies in between ‘a’ and ‘z’ or ‘A’ and ‘Z’ using comparison operators ‘>=’ and ‘<=’ . If true, its an alphabet, else its not an alphabet/
Step 5 - Display the result
Step 6 - Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in our coding ground tool .

import java.util.Scanner;
public class Alphabet {
   public static void main(String[] args) {
      char my_input;
      System.out.println("Required packages have been imported");
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.print("Enter the character : ");
      my_input = my_scanner.next().charAt(0);
      if( (my_input >= 'a' && my_input <= 'z') || (my_input >= 'A' && my_input <= 'Z'))
         System.out.println("The character " +my_input + " is an alphabet");
      else
         System.out.println("The character " +my_input + " is not an alphabet");
   }
}

Output

Required packages have been imported
A reader object has been defined
Enter the character : H
The character H is an alphabet

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class Alphabet {
   public static void main(String[] args) {
      char my_input;
      my_input = 'H';
      System.out.println("The Alphabet is defined as " +my_input);
      if( (my_input >= 'a' && my_input <= 'z') || (my_input >= 'A' && my_input <= 'Z'))
         System.out.println("The character " +my_input + " is an alphabet.");
      else
         System.out.println("The character " +my_input + " is not an alphabet.");
   }
}

Output

The Alphabet is defined as H
The character H is an alphabet.