Complete if exercises

exercises/03_if/if1.rs

@@ -2,13 +2,12 @@
 //
 // Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
-
 pub fn bigger(a: i32, b: i32) -> i32 {
     // Complete this function to return the bigger number!
     // Do not use:
     // - another function call
     // - additional variables
+    if a > b {a} else {b}
 }
 
 // Don't mind this for now :)

exercises/03_if/if2.rs

@@ -5,13 +5,18 @@
 //
 // Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
-
 pub fn foo_if_fizz(fizzish: &str) -> &str {
+    // &str is a string slice - 
+    // Let's say the full string is a ribbon
+    // A string slice is a piece of the ribbon
+    // It's just a reference to the ribbon so doing things to the piece won't change the original ribbon.
+
     if fizzish == "fizz" {
         "foo"
+    } else if fizzish == "fuzz" {
+        "bar"
     } else {
-        1
+        "baz"
     }
 }
 

exercises/03_if/if3.rs

@@ -2,17 +2,17 @@
 //
 // Execute `rustlings hint if3` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
-
 pub fn animal_habitat(animal: &str) -> &'static str {
+    // static is a lifetime, it means that the string will be valid for the entire duration of the program
+    // it's practically hardcoded into the program and always available
     let identifier = if animal == "crab" {
         1
     } else if animal == "gopher" {
-        2.0
+        2
     } else if animal == "snake" {
         3
     } else {
-        "Unknown"
+        0
     };
 
     // DO NOT CHANGE THIS STATEMENT BELOW