Trim trailing vowels

String

77.1% acceptance

Mar 15, 2026

You are given a string s that consists of lowercase English letters. Return the string obtained by removing all trailing vowels from s. The vowels consist of the characters 'a', 'e', 'i', 'o', and 'u'.

Solution

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

impl Solution {
  pub fn trim_trailing_vowels(s: String) -> String {
    let vowels = b"aeiou";
    let bytes = s.as_bytes();
    let mut end = bytes.len();
    while end > 0 && vowels.contains(&bytes[end - 1]) {
      end -= 1;
    }
    s[..end].to_string()
  }
}