From 8f0234e3a297d99c958e8b85e131ec9323cd53c7 Mon Sep 17 00:00:00 2001
From: Hunter Kvalevog <hunter@kvog.sh>
Date: Fri, 18 Sep 2026 16:30:30 -0500
Subject: rustlings: complete 04

---
 rustlings/exercises/04_primitive_types/primitive_types1.rs | 4 +---
 rustlings/exercises/04_primitive_types/primitive_types2.rs | 7 +------
 rustlings/exercises/04_primitive_types/primitive_types3.rs | 3 +--
 rustlings/exercises/04_primitive_types/primitive_types4.rs | 3 +--
 rustlings/exercises/04_primitive_types/primitive_types5.rs | 3 +--
 rustlings/exercises/04_primitive_types/primitive_types6.rs | 4 +---
 6 files changed, 6 insertions(+), 18 deletions(-)

(limited to 'rustlings/exercises')

diff --git a/rustlings/exercises/04_primitive_types/primitive_types1.rs b/rustlings/exercises/04_primitive_types/primitive_types1.rs
index 84923c7..778c0f6 100644
--- a/rustlings/exercises/04_primitive_types/primitive_types1.rs
+++ b/rustlings/exercises/04_primitive_types/primitive_types1.rs
@@ -6,9 +6,7 @@ fn main() {
         println!("Good morning!");
     }
 
-    // TODO: Define a boolean variable with the name `is_evening` before the `if` statement below.
-    // The value of the variable should be the negation (opposite) of `is_morning`.
-    // let …
+    let is_evening = !is_morning;
     if is_evening {
         println!("Good evening!");
     }
diff --git a/rustlings/exercises/04_primitive_types/primitive_types2.rs b/rustlings/exercises/04_primitive_types/primitive_types2.rs
index 1401847..a45f84d 100644
--- a/rustlings/exercises/04_primitive_types/primitive_types2.rs
+++ b/rustlings/exercises/04_primitive_types/primitive_types2.rs
@@ -12,12 +12,7 @@ fn main() {
         println!("Neither alphabetic nor numeric!");
     }
 
-    // TODO: Analogous to the example before, declare a variable called `your_character`
-    // below with your favorite character.
-    // Try a letter, try a digit (in single quotes), try a special character, try a character
-    // from a different language than your own, try an emoji 😉
-    // let your_character = '';
-
+    let your_character = '😉';
     if your_character.is_alphabetic() {
         println!("Alphabetical!");
     } else if your_character.is_numeric() {
diff --git a/rustlings/exercises/04_primitive_types/primitive_types3.rs b/rustlings/exercises/04_primitive_types/primitive_types3.rs
index 9b79c0c..c5a259d 100644
--- a/rustlings/exercises/04_primitive_types/primitive_types3.rs
+++ b/rustlings/exercises/04_primitive_types/primitive_types3.rs
@@ -1,6 +1,5 @@
 fn main() {
-    // TODO: Create an array called `a` with at least 100 elements in it.
-    // let a = ???
+    let a = [0; 1000];
 
     if a.len() >= 100 {
         println!("Wow, that's a big array!");
diff --git a/rustlings/exercises/04_primitive_types/primitive_types4.rs b/rustlings/exercises/04_primitive_types/primitive_types4.rs
index 16e4fd9..81af3e2 100644
--- a/rustlings/exercises/04_primitive_types/primitive_types4.rs
+++ b/rustlings/exercises/04_primitive_types/primitive_types4.rs
@@ -8,8 +8,7 @@ mod tests {
     fn slice_out_of_array() {
         let a = [1, 2, 3, 4, 5];
 
-        // TODO: Get a slice called `nice_slice` out of the array `a` so that the test passes.
-        // let nice_slice = ???
+        let nice_slice = &a[1..4];
 
         assert_eq!([2, 3, 4], nice_slice);
     }
diff --git a/rustlings/exercises/04_primitive_types/primitive_types5.rs b/rustlings/exercises/04_primitive_types/primitive_types5.rs
index 6e00ef5..a3e60d8 100644
--- a/rustlings/exercises/04_primitive_types/primitive_types5.rs
+++ b/rustlings/exercises/04_primitive_types/primitive_types5.rs
@@ -1,8 +1,7 @@
 fn main() {
     let cat = ("Furry McFurson", 3.5);
 
-    // TODO: Destructure the `cat` tuple in one statement so that the println works.
-    // let /* your pattern here */ = cat;
+    let (name, age) = cat;
 
     println!("{name} is {age} years old");
 }
diff --git a/rustlings/exercises/04_primitive_types/primitive_types6.rs b/rustlings/exercises/04_primitive_types/primitive_types6.rs
index a97e531..dec639a 100644
--- a/rustlings/exercises/04_primitive_types/primitive_types6.rs
+++ b/rustlings/exercises/04_primitive_types/primitive_types6.rs
@@ -8,9 +8,7 @@ mod tests {
     fn indexing_tuple() {
         let numbers = (1, 2, 3);
 
-        // TODO: Use a tuple index to access the second element of `numbers`
-        // and assign it to a variable called `second`.
-        // let second = ???;
+        let second = numbers.1;
 
         assert_eq!(second, 2, "This is not the 2nd number in the tuple!");
     }
-- 
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