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 line = sc.nextLine();
        int length = line.length();
        String ans = "";
        char[] a;
        a = new char[length];
        for(int i=0; i<length; i++) {
            a[i] = line.charAt(i);
            if(Character.isLowerCase(a[i])) ans += Character.toUpperCase(a[i]);
            else ans += Character.toLowerCase(a[i]); 
        }
        System.out.println(ans);
    }
}