diff --git a/.gitignore b/.gitignore
index 62bd1a4..807c21c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 # Generated by Cargo
 # will have compiled files and executables
 /target/
+target
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
 # More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
diff --git a/guessing_game/Cargo.toml b/guessing_game/Cargo.toml
new file mode 100644
index 0000000..8273987
--- /dev/null
+++ b/guessing_game/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+authors = ["gbrochar <gaetanbrochard@protonmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.5.5"
\ No newline at end of file
diff --git a/guessing_game/src/main.rs b/guessing_game/src/main.rs
new file mode 100644
index 0000000..cde116d
--- /dev/null
+++ b/guessing_game/src/main.rs
@@ -0,0 +1,32 @@
+use std::io;
+use std::cmp::Ordering;
+use rand::Rng;
+
+fn main() {
+    println!("Guess the number !");
+    
+    let secret_number = rand::thread_rng().gen_range(1, 101);
+    
+    loop {
+        println!("Please input your guess.");
+        let mut guess = String::new();
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+        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;
+            }
+        }
+    }
+}
diff --git a/hello_cargo/Cargo.toml b/hello_cargo/Cargo.toml
new file mode 100644
index 0000000..a2b61f1
--- /dev/null
+++ b/hello_cargo/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "hello_cargo"
+version = "0.1.0"
+authors = ["gbrochar <gaetanbrochard@protonmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/hello_cargo/src/main.rs b/hello_cargo/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/hello_cargo/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/hello_world/main b/hello_world/main
new file mode 100755
index 0000000..8175a89
Binary files /dev/null and b/hello_world/main differ
diff --git a/hello_world/main.rs b/hello_world/main.rs
new file mode 100644
index 0000000..fbedd92
--- /dev/null
+++ b/hello_world/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
\ No newline at end of file
diff --git a/rectangles/Cargo.toml b/rectangles/Cargo.toml
new file mode 100644
index 0000000..27c9146
--- /dev/null
+++ b/rectangles/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+authors = ["gbrochar <gaetanbrochard@protonmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/rectangles/src/main.rs b/rectangles/src/main.rs
new file mode 100644
index 0000000..55fd2e6
--- /dev/null
+++ b/rectangles/src/main.rs
@@ -0,0 +1,29 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn area(&self) -> u32 {
+        self.width * self.height
+    }
+
+    fn add_height(&mut self) {
+        self.height += 1;
+    }
+}
+
+fn main() {
+    let mut rect1 = Rectangle {
+        width: 30,
+        height: 50,
+    };
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        rect1.area()
+    );
+    rect1.add_height();
+    println!("{:#?}", rect1);
+}
\ No newline at end of file
diff --git a/strlen/Cargo.toml b/strlen/Cargo.toml
new file mode 100644
index 0000000..c0b7c86
--- /dev/null
+++ b/strlen/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "strlen"
+version = "0.1.0"
+authors = ["gbrochar <gaetanbrochard@protonmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/strlen/src/main.rs b/strlen/src/main.rs
new file mode 100644
index 0000000..c4a2607
--- /dev/null
+++ b/strlen/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let s1 = String::from("hello");
+    let len = calculate_length(&s1);
+
+    println!("The length of '{}' is {}.", s1, len);
+}
+
+fn calculate_length(s: &String) -> usize {
+    s.len()
+}
\ No newline at end of file