update

exercises/intro/intro2.rs

@@ -5,8 +5,6 @@
 // Execute `rustlings hint intro2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
- println!("Hello {}!");
+ println!("Hello {}!", "world");
 }

exercises/variables/variables1.rs

@@ -5,8 +5,6 @@
 // Execute `rustlings hint variables1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
  let x = 5;
  println!("x has the value {}", x);

exercises/variables/variables2.rs

@@ -3,10 +3,8 @@
 // Execute `rustlings hint variables2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
- let x;
+ let x = 10;
  if x == 10 {
  println!("x is ten!");
  } else {

exercises/variables/variables3.rs

@@ -3,9 +3,7 @@
 // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
- let x: i32;
+ let x: i32 = 1;
  println!("Number {}", x);
 }

exercises/variables/variables4.rs

@@ -3,10 +3,8 @@
 // Execute `rustlings hint variables4` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
- let x = 3;
+ let mut x = 3;
  println!("Number {}", x);
  x = 5; // don't change this line
  println!("Number {}", x);

exercises/variables/variables5.rs

@@ -3,11 +3,9 @@
 // Execute `rustlings hint variables5` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
  let number = "T-H-R-E-E"; // don't change this line
  println!("Spell a Number : {}", number);
- number = 3; // don't rename this variable
+ let number = 3; // don't rename this variable
  println!("Number plus two is : {}", number + 2);
 }

exercises/variables/variables6.rs

@@ -3,9 +3,7 @@
 // Execute `rustlings hint variables6` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
-const NUMBER = 3;
+const NUMBER:i32 = 3;
 fn main() {
  println!("Number {}", NUMBER);
 }