generics and lifetimes

generics/largest_number/src/main.rs

@@ -0,0 +1,31 @@
+fn main() {
+    let number_list = vec![34, 50, 25, 100, 65];
+    let largest = largest_number(&number_list);
+    println!("The largest number is {largest}");
+    // for number in &number_list {
+    //     if number > largest {
+    //         largest = number;
+    //     }
+    // }
+
+    let number_list = vec![102, 34, 6000, 89, 54, 2, 43, 8];
+    let largest = largest_number(&number_list);
+    println!("The largest number is {largest}");
+    // let mut largest = &number_list[0];
+    // for number in &number_list {
+    // if number > largest {
+    // largest = number;
+    // }
+    // }
+}
+
+fn largest_number(list: &[i32]) -> &i32 {
+    let mut largest = &list[0];
+
+    for number in list {
+        if number > largest {
+            largest = number;
+        }
+    }
+    largest
+}