Current progress

exercises/functions/functions1.rs

@@ -1,8 +1,11 @@
 // functions1.rs
 // Execute `rustlings hint functions1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn main() {
     call_me();
 }
+
+fn call_me() {
+    print!("Called");
+}

exercises/functions/functions2.rs

@@ -1,13 +1,12 @@
 // functions2.rs
 // Execute `rustlings hint functions2` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn main() {
-    call_me(3);
+    call_me(5);
 }
 
-fn call_me(num:) {
+fn call_me(num: i16) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }

exercises/functions/functions3.rs

@@ -1,10 +1,9 @@
 // functions3.rs
 // Execute `rustlings hint functions3` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn main() {
-    call_me();
+    call_me(3);
 }
 
 fn call_me(num: u32) {

exercises/functions/functions4.rs

@@ -7,21 +7,20 @@
 // in the signatures for now. If anything, this is a good way to peek ahead
 // to future exercises!)
 
-// I AM NOT DONE
 
 fn main() {
-    let original_price = 51;
+    let original_price: u32 = 51;
     println!("Your sale price is {}", sale_price(original_price));
 }
 
-fn sale_price(price: i32) -> {
-    if is_even(price) {
+fn sale_price(price: u32) -> u32 {
+    if (price % 2 == 0) {
         price - 10
     } else {
         price - 3
     }
 }
 
-fn is_even(num: i32) -> bool {
+fn is_even(num: u32) -> bool {
     num % 2 == 0
 }

exercises/functions/functions5.rs

@@ -1,7 +1,6 @@
 // functions5.rs
 // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn main() {
     let answer = square(3);
@@ -9,5 +8,5 @@ fn main() {
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    return num * num;
 }