control flow, primitive types and vectors

exercises/quizzes/quiz1.rs

@@ -12,6 +12,10 @@
 // the quantity bought.
 // fn calculate_price_of_apples(???) -> ??? { ??? }
 
+fn calculate_price_of_apples(qty: u32) -> u32 {
+    if qty < 41 { qty * 2 } else { qty }
+}
+
 fn main() {
     // You can optionally experiment here.
 }