update variables with type indication and added data types

variables/src/main.rs

@@ -2,14 +2,15 @@
 const NAME : &str = "John";
 const HEX_NUM : &i32 = &0x01;
 
-
-
 fn main() {
      // local variables dont need a type indication and are by default immutable
-    let local_name = "Dough";
-    let normal_int = 35;
-    let hex_int = 0x35;
-    let bin_int = 0b10101111;
+    let local_name: &str = "Dough"; // must be surrounded by double quotes
+    let normal_int: i32 = 35;
+    let hex_int: i32 = 0x35;
+    let bin_int: i32 = 0b10101111;
+    let height: f64 = 1.79;
+    let character: char = 'M';
+    let has_driver_license: bool = true;
 
     //make them mutable by mut modifier
     let mut middle_name = "Levy";
@@ -18,6 +19,9 @@ fn main() {
 
     println!("name: {} {} {}",NAME,middle_name, local_name);
     println!("age: {}", normal_int);
+    println!("gender: {}",character);
+    println!("has driver license: {}",has_driver_license);
+    println!("height: {}",height);
     println!("hex: {}",hex_int);
     println!("const hex: {}",HEX_NUM);
     println!("binary: {}",bin_int);