171. Excel Sheet Column Number Java Solutin

Related to question Excel Sheet Column Title

Given a column title as appear in an Excel sheet, return its corresponding column number.

For example:

    A -> 1
    B -> 2
    C -> 3
    ...
    Z -> 26
    AA -> 27
    AB -> 28 

Credits:
Special thanks to @ts for adding this problem and creating all test cases.

 

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public class Solution {
    public int titleToNumber(String s) {
        int result = 0;
        for(int i = 0;i<s.length();i++){
            result = result*26 + s.charAt(i) - 'A' + 1;
        }
        return result;
    }
}