rearranged things

examples/variables.txt

@@ -0,0 +1,5 @@
+- Variables are immutable by default
+- Normal variables can have their value reassigned, mutable variables must keep the same type
+  and immutable variables can have their values reassigned using let again, also allowing you
+  to change the type (shadowing)
+- Constant variables cannot have new variables reassigned to the name they use

examples/variables_mutable.rs

@@ -0,0 +1,12 @@
+/*
+ * x is defined as an mutable variable, the value is reassigned again later without redfining it.
+ * mutable variables are assigned one type, and the variable cannot be any other type other than the
+ * one it was originally assigned.
+*/
+
+fn main() {
+    let x = 5;
+    println!("The value of x is: {}", x);
+    let x = 6;
+    println!("The value of x is: {}", x);
+}

examples/variables_shadow.rs

@@ -0,0 +1,11 @@
+/*
+ * x is defined as an immutable variable, then defined again later (shadowed?)
+ * redefining a variable like this lets you change the type.
+*/
+
+fn main() {
+    let x = 5;
+    println!("The value of x is: {}", x);
+    let x = 6;
+    println!("The value of x is: {}", x);
+}

variables/.gitignore

@@ -1,10 +0,0 @@
-# will have compiled files and executables
-debug/
-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
-Cargo.lock
-
-# These are backup files generated by rustfmt
-**/*.rs.bk

variables/Cargo.toml

@@ -1,9 +0,0 @@
-[package]
-name = "variables"
-version = "0.1.0"
-authors = ["Emily J. <me@emily.im>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]

variables/src/main.rs

@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}