ownership

ownership/src/main.rs

@@ -1,5 +1,34 @@
 fn main() {
-    let mut s = String::from("Hello");
+    let s1 = String::from("Hello");
-    s.push_str(", World!");
+    let s2 = s1; // s1 goes out of scope here
-    println!("{s}");
+    println!("{s2}, world!");
+
+    let mut s = String::from("hello");
+    s = String::from("world"); // original "hello" value drops here
+    println!("hello, {s}");
+
+    let s1 = String::from("hello");
+    let s2 = s1.clone(); // heap data gets copied here
+    println!("s1 = {s1}, s2 = {s2}");
+
+    let s3 = String::from("forsen");
+    copy_string_value(s3);
+    // println!("{s3}");
+    // will throw and erorr
+
+    let s4 = String::from("gachi");
+    let (s5, len) = calculate_length(s4);
+    //println!("{s4}");
+    // also will throw an error
+    println!("string: {s5}, length: {len}")
+}
+
+fn copy_string_value(string: String) {
+    println!("{string}");
+}
+
+fn calculate_length(s: String) -> (String, usize) {
+    let length = s.len();
+
+    (s, length)
 }