# 58. Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

Example:

Input: "Hello World"
Output: 5

# Solution

Approach 1: Scan the string backwards to find the last word.

# Code (Python)

Approach 1:

# Code (C++)

Approach 1:

class Solution {
public:
    int lengthOfLastWord(string s) {
        int len = 0;
        for (int i = s.size() - 1; i >= 0; --i)
        {
            if (s[i] == ' ' && len > 0)
                break;
            else if (s[i] != ' ')
                len++;
        }
        return len;
    }
};