Number of Substrings With Only 1s.java

class Solution {
    public int numSub(String s) {
        char[] ch = s.toCharArray();
        long count =0;
        long result =0;
        for(int i=0; i<ch.length; i++){
            if(ch[i] == '1'){
                count++;
                result += count;
            }
            else{
                count = 0;
            
            }
        }
        return (int)(result%1000000007);
        
    }
}