fn main() {
    //borrowing => It means to allowing a function or variabe to use a value without taking
    //ownership : type: 
    //- immutable borrowing [read only access]
    //- mutable borrowing [read write access]
    let s = String::from("hello world");
    print_strirng(&s);

    let mut s1 = String::from("safal, hi");
    change_string(&mut s1);
    println!("{}", s1);

    //ownership => It means every value in Rust has single owner, the variable responsible for it,
    //When ownership changes, the previous owner can no longer use the value

    let owner = String::from("pantsu");
    let owner1 = owner;
    println!("{}", owner1);
}

//borrowing but read only
fn print_strirng(s: &String){
    println!("{} borrowed", s);
}

fn change_string(s: &mut String){
    s.push_str("!!");
}