ASCII sum value of all characters

January 23, 2022

why does my code fail? It fails on the chatAt function upon the second rotation of the for loop.

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        int sum = 0;

        for (int i = 0; i <n ; i++) {{
            String letter = scanner.nextLine();

            char valueOf = letter.charAt(i);
            int valueto = (int)valueOf;
            sum += valueto;
        }
        }
        System.out.println(sum);

    }
}

>Solution :

Your code is getting the character from ith index, which will throw an index out of range error, as i increases continuously throughout the loop.

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());
        int sum = 0;
        for (int i = 0; i <n ; i++) {{
            String letter = scanner.nextLine();
            // Set charAt 0th index to read the character from the input 
            char valueOf = letter.charAt(0);
            int valueto = (int)valueOf;
            sum += valueto;
        }
        }
        System.out.println(sum);

    }