58. Length of Last Word

• Difficulty: Easy

• Topics: String

• Similar Questions:

Problem:

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

Solutions:

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