say_hello_and_goodbye/
lib.rs

1pub fn say_hello(name: &str) -> String {
2    format!("Hello {}", name)
3}
4pub fn say_hello_to_everyone() -> String {
5    String::from("Hello All")
6}
7pub fn say_good_bye(name: &str) -> String {
8    format!("Good Bye {}", name)
9}
10pub fn say_good_bye_to_everyone() -> String {
11    String::from("Good Bye All")
12}
13
14// cargo publish