From c950c6f2861c1621db371f801651af145efaa4bc Mon Sep 17 00:00:00 2001
From: clonbg <clonbg@gmail.com>
Date: Tue, 23 May 2023 12:30:51 +0200
Subject: [PATCH] variables

---
 README.md              |  3 ++-
 hola_mundo/src/main.rs | 47 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index bdbd631..4a612c3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
 https://tinchicus.com/2022/09/26/rust-listado-del-curso-inicial/
 
-- https://tinchicus.com/2022/06/01/rust-usando-a-cargo/
+- https://tinchicus.com/2022/06/01/rust-usando-a-cargo/ (hola_mundo)
+- https://tinchicus.com/2022/06/03/rust-strings/
diff --git a/hola_mundo/src/main.rs b/hola_mundo/src/main.rs
index e7a11a9..7ffb281 100644
--- a/hola_mundo/src/main.rs
+++ b/hola_mundo/src/main.rs
@@ -1,3 +1,50 @@
+/// Statics, son como constantes globales
+static H: i32 = 21;
+
+/// Main
 fn main() {
     println!("Hello, world!");
+    // si no se especifica es inmutable
+    entero();
+    enteromutable();
+    // unsignet ocupa menos espacio en memoria
+    signet();
+    unsignet();
+    // const no se pueden modificar
+    constante();
+    //static declarada fuera
+    println!("{H}");
+    // castear (parsear)
+    castear(8);
+}
+
+fn entero() {
+    let x = 1;
+    println!("{x}");
+}
+
+fn enteromutable() {
+    let mut x = 1;
+    x = x + 3;
+    println!("{x}");
+}
+
+fn signet() {
+    let sig: i32 = 2048;
+    println!("{sig}");
+}
+
+fn unsignet() {
+    let unsig: u32 = 2048;
+    println!("{unsig}");
+}
+
+fn constante() {
+    const PI: f32 = 3.14159265;
+    println!("{PI}");
+}
+
+fn castear(a: i32) {
+    let valor_final = a as u32;
+    println!("{valor_final}");
 }