commit b924b7b5d2b433f2e9ebe1630b7bca063a563670
Author: Bartal Læarsson <bxtal@proton.me>
Date:   Mon Sep 28 13:52:41 2026 +0100

    complete section 1, guessing game

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..f60c6fb
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,137 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "cfg-if"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e7648175b45a9a48536d676f68d918270699102aa8dab5496df06904c914600"
+
+[[package]]
+name = "common-programming-concepts"
+version = "0.1.0"
+
+[[package]]
+name = "getrandom"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "guessing-game"
+version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.189"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
+dependencies = [
+ "zerocopy",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.107"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "985e7ec9bb745e6ce6535b544d84d6cd6f7ad8bd711c398938ae983b91a766d9"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fbf4db142a473a8d80c26bbf18454ed458bf8d26c8219c331daecfdbd079001"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rand"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e058c7de0b26af77780c769414d6257830bb240f3c38477dbc2c16e5f54d6d4c"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.119"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "872831b642d1a07999a962a351ed35b955ea2cfc8f3862091e2a240a84f17297"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d245f478577f809a851594d02313b640fb437e0bb33866753cff937863096954"
+
+[[package]]
+name = "wasi"
+version = "0.11.1+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
+
+[[package]]
+name = "zerocopy"
+version = "0.8.59"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6df92bf3d9227be3d53173901ddbffac2babc27ae50f397776ffd6dc33f800cb"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.59"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac4f328cf2f05d084e496c3e9c3f33ed0a183656a16e1fcec4d464d8373aec82"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..033c095
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[workspace]
+members = ["common-programming-concepts","guessing-game"]
+resolver = "2"
+
+[workspace.package]
+edition = "2024"
+version = "0.1.0"
+license = "MIT"
+
diff --git a/common-programming-concepts/Cargo.toml b/common-programming-concepts/Cargo.toml
new file mode 100644
index 0000000..99fe8a5
--- /dev/null
+++ b/common-programming-concepts/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "common-programming-concepts"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[dependencies]
diff --git a/common-programming-concepts/src/main.rs b/common-programming-concepts/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/common-programming-concepts/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/guessing-game/Cargo.toml b/guessing-game/Cargo.toml
new file mode 100644
index 0000000..f4a68bb
--- /dev/null
+++ b/guessing-game/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "guessing-game"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+rand = "0.8.5"
diff --git a/guessing-game/src/main.rs b/guessing-game/src/main.rs
new file mode 100644
index 0000000..1fbbf95
--- /dev/null
+++ b/guessing-game/src/main.rs
@@ -0,0 +1,61 @@
+// We import io from the standard library
+// It is like stdin stdout stderr and all that
+use std::cmp::Ordering;
+use std::io;
+
+use rand::Rng;
+
+// Main entry point of application
+fn main() {
+    // Use the println! macro to print to stdout
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..=100);
+
+    println!("Please input your guess.");
+
+    // here we start the while ish loop
+    loop {
+        // uncomment the next line if you want to see the secret number as stdout
+        // println!("The secret number is {secret_number}");
+
+        // declare a mutable variable which is a growable empty string
+        let mut guess = String::new();
+
+        // from io in the std lib use stdin as input to app
+        // use read_line to read the input and stores it in a reference to the mutable variable guess
+        // Then expect is used as err handling, if something goes wrong, write to stderr and quit
+        // program with 1
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("failed to read line");
+
+        // In rust, when converting types, you usually use the same var name, instead of doing something
+        // like let guess_int and let guess_str.
+        // here we define guess as unsigned 32 bit int, we reuse the guess variable, then we do a trim
+        // of it, because user input can contain 4\n which would cause it to fail always, as it cannot
+        // be parsed to an int. The parse step knows that it should parse it to the defined u32 data type.
+        // The expect has the result of either error or ok, and terminates the program if not valid
+        // integer.
+        // So here the expect is exchanged with match and pattern matching with the two result
+        // values, "Ok" and "Err". This is for gracefull err handling and starting the while loop
+        // again, even if you enter something invalid.
+        // Parse returns Result as mentioned above, but also "num" which is the Ok number
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        // print the user input with extrapolated guess variable in {} brackets
+        println!("You guessed: {guess}");
+
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+            println!("You win!");
+                break;
+            }
+        }
+    }
+}