Go-The-Complete-Developers-Guide

Go Command line tools

1. go build - compiles a bunch of go source code files

go build 
   
    
go build main.go

   

2. go run - Compiles and executes one or two files

go run 
   
    
go run main.go

   

3. go fmt - Formats all the code in each file in the current directory

go fmt 
   
     || go fmt 
    
     
go fmt main.go

    
   

4. go installs - Compiles and "installs" a package

go install 
   
     || go fmt 
    
     
go install main.go

    
   

5. go get - Downloads the source code of someone else's package

go get 
   

   

6. go test - Run any tests associated with the current project

go test 
   

   

Packages in Go

1. Executable Package:

package main

Defines a package that can be compiled and then executed

Must have a func called 'main'

2. Reusable Package:

package 
    

   

Defines a package that can be used as a dependency(helper code)

Variables/Types in Go

Variable declaration

var 
    
    
      = 
     
      
var card string = "Ace of spades"

     
    
   

Type can be omitted in Go. GO compiler will infer type based on the value.

var card = "Ace of spades"

Basic types in Go

| Type    |    Values      |
| ------- | -------------- |
|   bool  | true, false    |
|  string | "hi", "hello"  |
|   int   | 0, -1000, 9999 |
| float64 | 10.1, 0.0009, -100.003|