Check whether a character is an alphabet or not.

import java.util.Scanner;
public class Main
{
 public static void main(String[] args) {
     Scanner sc = new Scanner(System.in);
     boolean av = false;
   System.out.println("Enter the Alphabet ");
  char ch = sc.next().charAt(0);
  for(int i = 'A'; i<='Z'; i++){
      if(ch == i){
           av = true;
          break;
   
      }
  }
  if(av ==false){for(int i = 'a'; i<='a'; i++){
      if(ch == i){
           av = true;
          break;
   
      }
  }}
 
 
 
  if(av==true){System.out.println(ch + " is an Alphabet");}
  else{System.out.println(ch + " is not an Alphabet");}
    
 }
}