Convert Case | Convert small letters to capital letters and vice-versa

class ConvertCase {

    

    // ASCII Codes : A-Z = 65-90, a-z = 97-122, 0-9 = 48-57, Enter = 10, Space = 13, Esc = 27

    static void convertCase(String str) {

        System.out.println("Original String is : " + str);

        char[] chars = str.toCharArray();

        for(int i = 0; i < chars.length; i++) {

            // Convert capital later to small later

            if(chars[i] >= 65 && chars[i] <= 90) {

                chars[i] += 32; // 97-65 = 32

            } else if(chars[i] >= 'a' && chars[i] <= 'z') {

                    chars[i] -= 32; // 97-65 = 32

            }

        }

        System.out.println("Converted String is : " + new String(chars));

    }

    

public static void main (String[] args) {

String str = "Raghvendra Kumar Mishra";

convertCase(str);

}

}