Q58_Length_of_LastWord.cs

/*
	Given a string s consisting of words and spaces, return the length of the last word in the string.

A word is a maximal 
substring
 consisting of non-space characters only.

 

Example 1:

Input: s = "Hello World"
Output: 5
Explanation: The last word is "World" with length 5.
Example 2:

Input: s = "   fly me   to   the moon  "
Output: 4
Explanation: The last word is "moon" with length 4.
Example 3:

Input: s = "luffy is still joyboy"
Output: 6
Explanation: The last word is "joyboy" with length 6.
 

Constraints:

1 <= s.length <= 104
s consists of only English letters and spaces ' '.
There will be at least one word in s.


ans:

https://leetcode.com/problems/length-of-last-word/
*/



public class Solution {
    public int LengthOfLastWord(string s) {
        
        int length = 0;
        int i = s.Length - 1;

        while (i>=0  &&  s[i] == ' ') {
            i--;
        }

        do {
            length++;
            i--;
        } while (i >= 0  &&  s[i] != ' ');

        return length;
    }
}