control flow, primitive types and vectors

exercises/03_if/if1.rs

@@ -4,10 +4,13 @@ fn bigger(a: i32, b: i32) -> i32 {
     // Do not use:
     // - another function call
     // - additional variables
+
+    if a > b { a } else { b }
 }
 
 fn main() {
     // You can optionally experiment here.
+    println!("{}", bigger(32, 42));
 }
 
 // Don't mind this for now :)

exercises/03_if/if2.rs

@@ -2,8 +2,10 @@
 fn picky_eater(food: &str) -> &str {
     if food == "strawberry" {
         "Yummy!"
+    } else if food == "potato" {
+        "I guess I can eat that."
     } else {
-        1
+        "No thanks!"
     }
 }
 

exercises/03_if/if3.rs

@@ -3,11 +3,11 @@ fn animal_habitat(animal: &str) -> &str {
     let identifier = if animal == "crab" {
         1
     } else if animal == "gopher" {
-        2.0
+        2
     } else if animal == "snake" {
         3
     } else {
-        "Unknown"
+        0
     };
 
     // Don't change the expression below!