Merge 88086d6b9c into b5bbd7247a

functions/functions1.rs

@@ -4,7 +4,9 @@ fn main() {
     call_me();
 }
 
-
+fn call_me() {
+    println!("thank you for calling me :)");
+}
 
 
 

functions/functions2.rs

@@ -4,7 +4,7 @@ fn main() {
     call_me(3);
 }
 
-fn call_me(num) {
+fn call_me(num: i32) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }

functions/functions3.rs

@@ -1,7 +1,7 @@
 // Make me compile! Scroll down for hints :)
 
 fn main() {
-    call_me();
+    call_me(5);
 }
 
 fn call_me(num: i32) {

functions/functions4.rs

@@ -8,7 +8,7 @@ fn main() {
     println!("Your sale price is {}", sale_price(original_price));
 }
 
-fn sale_price(price: i32) -> {
+fn sale_price(price: i32) -> i32 {
     if is_even(price) {
         price - 10
     } else {

functions/functions5.rs

@@ -6,7 +6,7 @@ fn main() {
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    num * num
 }
 
 

variables/variables1.rs

@@ -1,7 +1,7 @@
 // Make me compile! Scroll down for hints :)
 
 fn main() {
-    x = 5;
+    let x = 5;
     println!("x has the value {}", x);
 }
 

variables/variables2.rs

@@ -1,7 +1,7 @@
 // Make me compile! Scroll down for hints :)
 
 fn main() {
-    let x;
+    let x = 10;
     if x == 10 {
         println!("Ten!");
     } else {

variables/variables3.rs

@@ -1,7 +1,7 @@
 // Make me compile! Scroll down for hints :)
 
 fn main() {
-    let x = 3;
+    let mut x = 3;
     println!("Number {}", x);
     x = 5;
     println!("Number {}", x);

variables/variables4.rs

@@ -1,7 +1,7 @@
 // Make me compile! Scroll down for hints :)
 
 fn main() {
-    let x: i32;
+    let x: i32 = 777;
     println!("Number {}", x);
 }