README.md

709. To Lower Case

Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.

Example 1:

Input: "Hello"
Output: "hello"

Example 2:

Input: "here"
Output: "here"

Example 3:

Input: "LOVELY"
Output: "lovely"

Solutions (Rust)

1. Convert Every Chars

impl Solution {
    pub fn to_lower_case(str: String) -> String {
        let mut lower_case_str = String::new();
        for ch in str.chars() {
            lower_case_str.push(ch.to_ascii_lowercase());
        }
        lower_case_str
    }
}