Day61 added multithreading in rust

Day61/rust/main.rs

@@ -0,0 +1,26 @@
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    // Create a vector to hold the thread handles
+    let mut handles = vec![];
+
+    // Spawn 5 threads
+    for i in 1..=5 {
+        let handle = thread::spawn(move || {
+            println!("Thread {} is starting.", i);
+            thread::sleep(Duration::from_secs(2));
+            println!("Thread {} is done.", i);
+        });
+
+        // Push the handle into the vector
+        handles.push(handle);
+    }
+
+    // Wait for all threads to finish
+    for handle in handles {
+        handle.join().unwrap();
+    }
+
+    println!("All threads have completed.");
+}