initial commit

.gitignore

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+/target

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/variable_stuff.iml" filepath="$PROJECT_DIR$/.idea/variable_stuff.iml" />
+    </modules>
+  </component>
+</project>

.idea/variable_stuff.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="CPP_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "variable_stuff"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "variable_stuff"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::io;
+
+const THREE_HOURS_IN_SECONDS: u32 = 60 * 60 * 3;
+
+fn main() {
+    let mut x = 5;
+    println!("The value of x is: {x}");
+    x = 6;
+    println!("The value of x is: {x}");
+
+    println!("{THREE_HOURS_IN_SECONDS}");
+
+    let z = 5;
+
+    let z = z + 1;
+
+    {
+        let z = z * 2;
+        println!("The value of z in the inner scope is: {z}");
+    }
+
+    println!("The value of z is: {z}");
+
+    let spaces = "   ";
+    let spaces = spaces.len();
+    println!("{spaces}");
+
+    let glert: u32 = "42".parse().expect("Not a number!");
+    println!("{glert}");
+
+    let q = 2.76; // f64
+    let r: f32 = 3.11; // f32
+    let s = 4.0;
+    println!("{q}");
+    println!("{r}");
+    println!("{s}"); // why is this printing as if it were an integer?
+
+    // addition
+    let sum = 5 + 10;
+    println!("SUM: {sum}");
+
+    // subtraction
+    let difference = 95.5 - 4.3;
+    println!("DIFF: {difference}");
+
+    // multiplication
+    let product = 4 * 30;
+    println!("PROD: {product}");
+
+    // division
+    let quotient = 56.7 / 32.2;
+    let floored = 2 / 3; // Results in 0
+    println!("QUOT: {quotient}");
+    println!("FLOOR: {floored}");
+
+    // remainder
+    let remainder = 43 % 5;
+    println!("MOD: {remainder}");
+
+    let tup = (500, 6.4, "cowherd");
+    let (m, n, o) = tup;
+    println!("The value of M is: {m}");
+    println!("The value of N is: {n}");
+    println!("The value of O is: {o}");
+
+    let months = ["January", "February", "March", "April", "May", "June", "July",
+        "August", "September", "October", "November", "December"];
+    for mn in months {
+        println!("{mn}");
+    }
+
+    let j = [1, 2, 3, 4, 5];
+
+    println!("Please enter an array index.");
+
+    let mut index = String::new();
+
+    io::stdin()
+        .read_line(&mut index)
+        .expect("Failed to read line");
+
+    let index: usize = index
+        .trim()
+        .parse()
+        .expect("Index entered was not a number");
+
+    let element = j[index];
+
+    println!("The value of the element at index {index} is: {element}");
+}