Leetcode 题目解析之 Excel Sheet Column Title

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

For example:

代码语言：javascript复制

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

代码语言：javascript复制

    public String convertToTitle(int n) {
        if (n < 27) {
            return (char) ('A'   (n - 1))   "";
        }
        if (n % 26 == 0) {
            return convertToTitle(n / 26 - 1)   'Z';
        }
        return convertToTitle(n / 26)   convertToTitle(n % 26);
    }

excel integer return title

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