Init from a func return value

rustbook/functions/src/main.rs

@@ -1,8 +1,9 @@
+fn five() -> i32 {
+    5
+}
+
 fn main() {
-    let y = {
-        let x = 3;
-        x + 1
-    };
+    let x = five();
 
-    println!("The value of y is: {}", y);
+    println!("The value of x is: {}", x);
 }