01 Installation & Hello World

Go (Golang) Google ki language hai jo Simple, Fast, aur Concurrency ke liye jani jati hai.

1. Installation 🛠️

Download: golang.org par jayein.
Install: Apne OS (Mac/Windows) ke hisab se package download karke run karein.
Check: Terminal open karein aur type karein:
Terminal window
```
go version
```
Agar version dikh raha hai (e.g., go version go1.21), to setup done! ✅

2. Hello World 🌍

Ek file banayein main.go:

package main // 1. Package Declaration

import "fmt" // 2. Import Package (Formatting)

func main() { // 3. Main Function (Entry Point)
    fmt.Println("Namaste Go Lang! 🙏")
}

Run kaise karein?

Terminal me file wale folder me jayein aur likhein:

go run main.go

Output: Namaste Go Lang! 🙏

3. Go File Structure 🏗️

package main: Har executable Go file main package se shuru hoti hai.
import: Doosre packages (libraries) load karne ke liye.
func main(): Ye wo function hai jahan se program shuru hota hai.
Semicolons (;): Go me semicolons lagane ki zaroorat nahi hai (compiler khud laga deta hai).