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.

For example, 
Given s = "Hello World",

return 5.

int lengthOfLastWord(const char *s) {    int length = strlen(s);    int count = 0;    for(int i= length-1; i>=0;i--){        if(s[i] == ' '){            if(count == 0) continue;            else return count;        }        count++;    }    return count;}