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();
        for(int i  = 0; i < str.length(); i++){
            char c = str.charAt(i);
            if(Character.isUpperCase(c)){
                c = Character.toLowerCase(c);
            }else if(Character.isLowerCase(c)){
                c = Character.toUpperCase(c);
            }
            System.out.print(c);
        }
        System.out.println();
        sc.close();
    }    
}