LeetCode in Kotlin
58. Length of Last Word
Easy
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 <= 104sconsists of only English letters and spaces' '.- There will be at least one word in
s.
Solution
class Solution {
fun lengthOfLastWord(s: String): Int {
var len = 0
for (i in s.length - 1 downTo 0) {
val ch = s[i]
if (ch == ' ' && len > 0) {
break
} else if (ch != ' ') {
len++
}
}
return len
}
}