Simple if condifition

src/main.rs

@@ -1,114 +1,12 @@
-fn foo() {
-    println!("Hello from foo()");
-}
-
-fn answer_to_all_questions() -> u32 {
-    42
-}
-
-fn add_two_numbers(a: u32, b: u32) -> u32 {
-    a + b
-}
-
-trait Vector {
-    fn dot(&self, other: &Self) -> f32;
-    fn length(&self) -> f32;
-}
-
-struct Vector2 {
-    x: f32,
-    y: f32,
-}
-
-impl Vector2 {
-    pub fn new(x: f32, y: f32) -> Vector2 {
-        Vector2 { x, y }
-    }
-}
-
-impl Vector for Vector2 {
-    fn dot(&self, other: &Vector2) -> f32 {
-        self.x * other.x + self.y * other.y
-    }
-
-    fn length(&self) -> f32 {
-        self.dot(self).sqrt()
-    }
-}
-
-struct Vector3 {
-    x: f32,
-    y: f32,
-    z: f32,
-}
-
-impl Vector3 {
-    pub fn new(x: f32, y: f32, z: f32) -> Vector3 {
-        Vector3 { x, y, z }
-    }
-}
-
-impl Vector for Vector3 {
-    fn dot(&self, other: &Vector3) -> f32 {
-        self.x * other.x + self.y * other.y + self.z * other.z
-    }
-
-    fn length(&self) -> f32 {
-        self.dot(self).sqrt()
-    }
-}
-
-impl std::ops::Add for Vector3 {
-    type Output = Vector3;
-    fn add(self, other: Self) -> Self {
-        Vector3::new(self.x + other.x, self.y + other.y, self.z + other.z)
-    }
-}
-
-struct Meter {
-    value: f32,
-}
-
-impl Meter {
-    pub fn new(value: f32) -> Meter {
-        Meter { value }
-    }
-}
-
-struct SquareMeter {
-    value: f32,
-}
-
-impl SquareMeter {
-    pub fn new(value: f32) -> SquareMeter {
-        SquareMeter { value }
-    }
-}
-
-impl std::ops::Mul for Meter {
-    type Output = SquareMeter;
-
-    fn mul(self, rhs: Self) -> Self::Output {
-        SquareMeter::new(self.value * rhs.value)
-    }
-}
-
 fn main() {
-    let vec1 = Vector3::new(2.0, 0.0, 0.0);
-    let vec2 = Vector3::new(1.0, 1.0, 0.0);
+    let number = 24;
 
-    let vec3 = vec1 + vec2;
-
-    let m1 = Meter::new(10.0);
-    let m2 = Meter::new(90.0);
-
-    let area = m1 * m2;
-
-    println!("Hello, world!");
-    println!("Answer to all questions: {}", answer_to_all_questions());
-    println!("Add two number: {}", add_two_numbers(23, 42));
-
-    println!("x: {}, y: {}, z: {}", vec3.x, vec3.y, vec3.z);
-
-    foo();
+    // Simlar as we know it from other programing languages
+    // No parantheses around condigition.
+    // Condition has to be a boolean
+    if number > 23 {
+        println!("foo");
+    } else {
+        println!("bar");
+    }
 }