1 - Introduction

Why GO?

• For a simpler reason, because it’s new, free and open-source.
• Most of the time my boss asks me to work on new technology when it’s not new to market and others are praising it… (then I give him the advantages and dis-advantages if we use that)
• Let me list down few benefits
• Crisp
• Clean and effective
• Fast
• Awesome con-currency mechanism
• And many more...

Attraction

• Main attraction : Open-source
• Performance wise, it utilize the maximum capacity of hardware
• Interface mechanism
• Reflection
• Fast compilation and Quick conversion to machine code
• Type system : awesome
• Neat and modular
• ETC... ETC... ETC...

Let's start learning Go Language (golang)

• To begin with GO, first of all you need to have Go framework installed on your computer.
• Visit - https://golang.org/dl/
• Download the version best suited for your application
• At the time of installation, just note down the path where you are installing it
• In installation, it is just un-zipping the framework files. Go ahead an take look, open any file (its open-source…)

Configuration...

• Go compiler uses two environment variable
• GOROOT : set the value where you installed your go framework
• GOPATH : set the value where you are working
• For example, in our windows systems, we used to install it in
• C:\Go folder and work in D:\Go folder so,
• GOROOT = C:\Go
• GOPATH = D:\Go
• That’s all… Our primary set-up for Go-Language is done

First Small Run...

• Let’s make a basic, “Hello World.” console application.
• Open a notepad and write below mentioned things in there.
• Save it as helloworld.go in (GOPATH)/Src/ folder

• In our case, it'll be "D:\Go\Src\helloworld.go"

Try Getting Output...

• Open the command prompt and browse to that directory where this file is stored (and also configured as GOPATH)
• Now, run bellow mentioned command
• go install
• It will compile and create an executable file in bin folder (created as a sibling to Src folder)
• Try executing this file and you’ll get "Hello, world."