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();
String answer = "";
int length = line.length();
for(int i = 0;i<length;i++){
  char ch = line.charAt(i);
if(Character.isLowerCase(ch)){
  answer+=Character.toUpperCase(ch);
}
else{
  answer+=Character.toLowerCase(ch);
}
}
  System.out.println(answer);
}
}