LeetCode - Excel Sheet Column Title

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

For example:

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

Example 1:

Input: 1
Output: "A"

Example 2:

Input: 28
Output: "AB"

Example 3:

Input: 701
Output: "ZY"

Java Solution :

class Solution {
    public String convertToTitle(int n) {
        
        StringBuilder sb = new StringBuilder();
        
        while(n > 0){
            n--;
            char ch = (char) (n%26 + 'A');
            n = n/26;
            sb.append(ch);
        }
        sb.reverse();
        return sb.toString();
        
    }
}