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/*P5Q1
 * Name: Wang Chaoran
 * Description:
1 (Converting an uppercase letter to lowercase)
Write a method that converts an uppercase letter to a lowercase letter. Use the following method header:
public static char upperCaseToLowerCase(char ch)
For example, upperCaseToLowerCase('B') returns b.
*/
import java.util.Scanner;
public class P5Q1{
 
  public static void main(String[] Args){
   
    //input
    Scanner scan = new Scanner(System.in);
    System.out.println("Please enter an uppercase letter: ");
    char input = scan.next().charAt(0);
   
    //defensive
    if((input>='A')&&(input<='Z'))
    {
    System.out.println("The lowercase letter of "+input+" is "+upperCaseToLowerCase(input)+".");
   
    }
    else{
    System.out.println("You should enter an uppercase letter!");
    System.exit(0);
    }
   
  }
 
  //output method
  public static char upperCaseToLowerCase(char ch){
    return (char)((int)(ch)+32);
  }
 
}