rust 字符串大小写转换

180it 2023-04-03 PM 577℃ 0条
fn main() {
    let s = "Hello, World!";
    let upper = s.to_uppercase();
    let lower = s.to_lowercase();

    println!("Original: {}", s);
    println!("Upper case: {}", upper);
    println!("Lower case: {}", lower);
}
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rust 字符串大小写转换