//Mixed Case Converter
            if (choice == 3 && choiceGiven)
            {
                for (int i = 0; i < sentence.length(); i++)
                {
                    letter[i] = sentence.charAt(i);  //breaks down sentence into array of characters
                    charInt[i] = (int)letter[i];  //converts array of characters into ascii integers

                    //Converts everything to lowercase to make it easier to convert first letters
                    if (charInt[i] > 64 && charInt[i] < 91)
                    {
                        charInt[i] += 32;
                        letter[i] = (char)charInt[i];
                    }

                    //Converts ONLY first letter to uppercase by changing the ascii number
                    /**I only changed the first letter to uppercase because the next if statement requires
                     * the lowercase letter to be after a space character but since the first character of
                     * the sentence CANNOT have spacing, it crashes the programing given an error regarding
                     * -1 index position. This is the fix.
                     */
                    if (charInt[0] > 96 && charInt[0] < 123)
                    {
                        charInt[i] -= 32;
                        letter[i] = (char)charInt[i];
                    }

                    //Converts ALL first letters to uppercase by changing the ascii number
                    if (charInt[i] > 96 && charInt[i] < 123 && letter[i-1] == (char)32)
                    {
                        charInt[i] -= 32;
                        letter[i] = (char)charInt[i];
                    }

                    //Excludes number using carriage return character(13) which deletes the text and goes to previous character
                    if (charInt[i] > 47 && charInt[i] < 58 && omitLettersGiven == true)
                    {
                        charInt[i]= 13;
                        letter[i] = (char)charInt[i];
                    }

                    builtWord += letter[i]; //Rebuilts sentence using NEW chracters
                }
                System.out.println ("\n");
                System.out.println(builtWord);  //Outputs word
                System.out.println ("\n");
                builtWord = "";  //Resets value of the builtWord so if user chooses to try another case the new word doesn't build on the old word

                choiceGiven = false; //Allows user to try another case converter since the current one just finished
            }