From e0291e1c592ca828ad8b20347d836b6d203f3f54 Mon Sep 17 00:00:00 2001
From: Manuel <clonbg@gmail.com>
Date: Fri, 13 Feb 2026 15:54:56 +0100
Subject: [PATCH] Add beginner level concepts to main

---
 README.md |  1 +
 main.go   | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 89 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 32dd763..edd056c 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,4 @@ https://www.youtube.com/watch?v=ID9NZ88JeOE
 
 1. (00:04:58) Package
 2. (00:15:14) Func
+3. (00:32:22) Fin nivel principiante
diff --git a/main.go b/main.go
index d0615e8..eb72bd8 100644
--- a/main.go
+++ b/main.go
@@ -1,8 +1,9 @@
 package main
 
 import (
-	"fmt"
 	"curso-goland/mathutil"
+	"errors"
+	"fmt"
 	"math"
 )
 
@@ -38,4 +39,90 @@ func main() {
 	fmt.Println(GrauCelsius)
 
 	fmt.Println(A + B)
+
+	decirHola()
+
+	fmt.Println(sumar(6, 8))
+
+	division, err := dividir(6, 0)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println(division)
+
+	// La primera parte crea la y, la segunda la compara
+	if y := 10; y > 5 {
+		fmt.Println(y)
+	}
+
+	number := 0
+	if number < 0 {
+		fmt.Println("Es negativo")
+	} else if number > 0 {
+		fmt.Println("Es positivo")
+	} else {
+		fmt.Println("Es cero")
+	}
+
+	for i := 0; i < 3; i++ {
+		fmt.Println(i)
+	}
+
+	nums := []int{1, 2, 3}
+
+	for _, num := range nums {
+		fmt.Println(num)
+	}
+
+	for idx, num := range nums {
+		fmt.Println(idx, "-> ", num)
+	}
+
+	day := 3
+	switch day {
+	case 1:
+		fmt.Println("Lunes")
+	case 2:
+		fmt.Println("Martes")
+	case 3:
+		fmt.Println("Miercoles")
+	default:
+		fmt.Println("No es un dia valido")
+	}
+
+	letra := 'a'
+	switch letra {
+	case 'a', 'e', 'i', 'o', 'u':
+		fmt.Println("Vocal")
+	default:
+		fmt.Println("Consonante")
+	}
+
+	numero := 1
+	switch numero {
+	case 0:
+	case 1:
+		fmt.Println("Es cero o uno")
+	case 2:
+		fmt.Println("Dos")
+	default:
+		fmt.Println("No es un numero valido")
+	}
+}
+
+// Fin main
+
+func decirHola() {
+	fmt.Println("Hola")
+}
+
+func sumar(a, b int) int {
+	return a + b
+}
+
+func dividir(a, b int) (int, error) {
+	if b <= 0 {
+		return 0, errors.New("b debe ser mayor a 0")
+	}
+	return a / b, nil
 }