From 4c19aab2f9232fca8515164a3fd0205ee371ff77 Mon Sep 17 00:00:00 2001
From: Manuel <clonbg@gmail.com>
Date: Wed, 11 Feb 2026 08:26:53 +0100
Subject: [PATCH] Add mathutil package and constants

Introduce a new package for math utilities, including an Add function
and Euler's number. Also, add constants for Celsius conversion and basic
arithmetic.
---
 README.md            |  1 +
 go.mod               |  3 +++
 main.go              | 32 ++++++++++++++++++++++++++++++++
 mathutil/mathutil.go |  7 +++++++
 4 files changed, 43 insertions(+)
 create mode 100644 go.mod
 create mode 100644 mathutil/mathutil.go

diff --git a/README.md b/README.md
index 90ff99d..32dd763 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,4 @@
 https://www.youtube.com/watch?v=ID9NZ88JeOE
 
 1. (00:04:58) Package
+2. (00:15:14) Func
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..4c0aa92
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module curso-goland
+
+go 1.25.0
diff --git a/main.go b/main.go
index 2ca0d5e..d0615e8 100644
--- a/main.go
+++ b/main.go
@@ -2,8 +2,40 @@ package main
 
 import (
 	"fmt"
+	"curso-goland/mathutil"
+	"math"
+)
+
+const GrauCelsius = 273.15
+
+const (
+	A = 1
+	B = 2
 )
 
 func main() {
 	fmt.Println("Hello, World!")
+
+	fmt.Println(mathutil.Add(1, 2))
+
+	fmt.Println(math.Sqrt(144))
+
+	var x int = 10
+	x = x + 1
+	fmt.Println(x)
+
+	var a, b int = 1, 2
+	c := a + b
+	fmt.Println(c)
+
+	nombre, edad := "Juan", 30
+	fmt.Println(nombre, edad)
+
+	fmt.Println(mathutil.EulersNumber)
+
+	fmt.Println(math.Pi)
+
+	fmt.Println(GrauCelsius)
+
+	fmt.Println(A + B)
 }
diff --git a/mathutil/mathutil.go b/mathutil/mathutil.go
new file mode 100644
index 0000000..cc06158
--- /dev/null
+++ b/mathutil/mathutil.go
@@ -0,0 +1,7 @@
+package mathutil
+
+var EulersNumber float64 = 2.7182818284590452353602874713526624977572470936999595749669676277240766303535475945713821785251664274
+
+func Add(a, b int) int {
+	return a + b
+}