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# Excel Sheet Column Number LeetCode Solution

## Problem – Excel Sheet Column Number

Given a string `columnTitle` that represents the column title as appears in an Excel sheet, return its corresponding column number.

For example:

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

Example 1:

``````Input: columnTitle = "A"
Output: 1``````

Example 2:

``````Input: columnTitle = "AB"
Output: 28``````

Example 3:

``````Input: columnTitle = "ZY"
Output: 701``````

Constraints:

• `1 <= columnTitle.length <= 7`
• `columnTitle` consists only of uppercase English letters.
• `columnTitle` is in the range `["A", "FXSHRXW"]`.

### Excel Sheet Column Number LeetCode Solution in Java

``````int result = 0;
for (int i = 0; i < s.length(); result = result * 26 + (s.charAt(i) - 'A' + 1), i++);
return result;``````

### Excel Sheet Column Number LeetCode Solution in C++

``````int result = 0;
for (int i = 0; i < s.size(); result = result * 26 + (s.at(i) - 'A' + 1), i++);
return result;``````

### Excel Sheet Column Number LeetCode Solution in Python

``````return reduce(lambda x, y : x * 26 + y, [ord(c) - 64 for c in list(s)])
``````
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