caeserciphercode

package caeser.ciphar;

import java.util.Scanner;
public class CaeserCiphar {

   
    public static void main(String[] args) {
       String message, encryptedMessage = "";
		int key;
		char ch;
		Scanner sc = new Scanner(System.in);
		
		System.out.println("Enter a message: ");
		message = sc.nextLine();
		
		System.out.println("Enter key: ");
		key = sc.nextInt();
 
		for(int i = 0; i < message.length(); ++i){
			ch = message.charAt(i);
			
			if(ch >= 'a' && ch <= 'z'){
	            ch = (char)(ch + key);
	            
	            if(ch > 'z'){
	                ch = (char)(ch - 'z' + 'a' - 1);
	            }
	            
	            encryptedMessage += ch;
	        }
	        else if(ch >= 'A' && ch <= 'Z'){
	            ch = (char)(ch + key);
	            
	            if(ch > 'Z'){
	                ch = (char)(ch - 'Z' + 'A' - 1);
	            }
	            
	            encryptedMessage += ch;
	        }
	        else {
	        	encryptedMessage += ch;
	        }
		}
		
		System.out.println("Encrypted Message = " + encryptedMessage);
	}
}