Char Sum

Consider All lowercase Alphabets of the English language. Here we consider each alphabet from a to z to have a certain weight. The weight of the alphabet a is considered to be 1, b to be 2, c to be 3 and so on until z has a weight of 26. In short, the weight of the alphabet a is 1, and the weight of all other alphabets is the weight of its previous alphabet + 1.
Now, you have been given a String S consisting of lowercase English characters. You need to find the summation of weight of each character in this String.
For example, Consider the String aba
Here, the first character a has a weight of 1, the second character b has 2 and the third character a again has a weight of 1. So the summation here is equal to : 1+2+1=4
Input Format:
The first and only line of input contains the String S.
Output Format:
Print the required answer on a single line
Constraints:
1≤|S|≤100

SAMPLE INPUT

aba

SAMPLE OUTPUT

4

Solution-

import java.util.*;

class Charsum{

    public static void main(String[] args) {

        Scanner sc=new Scanner(System.in);

        String s=sc.nextLine();//abaabca

        char ch[]=s.toCharArray();

        int sum=0;

        for(int i=0;i<s.length();i++)

        {

            int c=ch[i]-96;

            sum=sum+c;

        }

        System.out.println(sum);

    }

}