Learn variables

src/variables.rs

@@ -0,0 +1,73 @@
+fn main() {
+    mutability();
+    constant();
+    shadowing();
+    float();
+    boolean();
+    char();
+    tuple();
+    array();
+}
+
+fn mutability() {
+    let mut x = 5;
+    println!("x has the value {}", x);
+    x = 6;
+    println!("x has the value {}", x);
+}
+
+fn constant() {
+    const THREE_HOURS_IN_SECONDS: u32 = 3 * 60 * 60;
+    println!("The constant is {}", THREE_HOURS_IN_SECONDS);
+}
+
+fn shadowing() {
+    let x = 5;
+    let x = x + 1;
+
+    {
+        let x = x * 2;
+        println!("La valeur de x dans la portée interne est {}", x);
+    }
+
+    println!("La valeur de x est {}", x);
+}
+
+fn float() {
+    let x = 2.0;
+    let y: f32 = 3.0;
+    println!("La valeur de x est {}", x);
+    println!("La valeur de y est {}", y);
+}
+
+fn boolean() {
+    let t = true;
+    let f: bool = false;
+    println!("La valeur de t est {}", t);
+    println!("La valeur de f est {}", f);
+}
+
+fn char() {
+    let c = 'z';
+    let z = 'ℤ';
+    let heart_eyed_cat = '😻';
+    println!("La valeur de c est {}", c);
+    println!("La valeur de z est {}", z);
+    println!("La valeur de heart_eyed_cat est {}", heart_eyed_cat);
+}
+
+fn tuple() {
+    let tup:(i32, f64, u8) = (-500, 6.4, 1);
+    let (_x, y, _z) = tup;
+    println!("The value of y is {}", y);
+    println!("The value of y is {}", tup.1);
+}
+
+fn array() {
+    let a = [1, 2, 3, 4, 5];
+    println!("The value of a[0] is {}", a[0]);
+    let months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
+    println!("The value of 5th month is {}", months[4]);
+    let b = [3; 5];
+    println!("The value of the last element of b is {}", b[b.len() - 1]);
+}