This repo contains the code for Go tutorials.

Go - 101 helloworld.go - a simple helloworld program in GO
To run the program, issue the command

% go run helloworld.go

In case you want to build the program and execute the binaries

% go build helloworld.go

% ./helloworld

create a directory 'apis' and switch to the directory

% mkdir apis 
% cd apis 

create a go mod file as shown

% go mod init github.com/go-tutorial/apps
go: creating new go.mod: module github.com/go-tutorial/apps

calling the module from the main module

Go to the go.mod in the root directory of the project

create the mapping to the local module in go.mod

replace github.com/rajamanohar/Go-Tutorial/apis => ./apis

and then move back to calling module and run

% go mod tidy 

It will create the requirement in go.mod file as shown below

require github.com/rajamanohar/Go-Tutorial/apis v0.0.0-00010101000000-000000000000

utility/util.go - has a method to reverse a string using external module

To download an external module into your Go module

% go get golang.org/x/example

If your project config does not allow you to download the external module, configure GOPRIVATE as shown below.

The above external go module dependecy requires proxy from golang.org and github.com

% export GOPRIVATE=golang.org,github.com

Then, create dependencies in the main go.mod and run go mod tidy

% go run .
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