Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in JAVA (judge verdict: Accepted)

import java.util.Scanner;
public class Main {
	 public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        String str = sc.nextLine();
	        char ch[] = str.toCharArray();
	        for(int i = 0; i < str.length(); i++){
	            if(Character.isUpperCase(ch[i])){
	                ch[i] = Character.toLowerCase(ch[i]);
	            }
	            else if(Character.isLowerCase(ch[i])){
	                ch[i] = Character.toUpperCase(ch[i]);
	            }
	        }
	        System.out.println(ch);
	    }
	}