go-by-example

Basics

Set GOPATH
go version
go help
godoc fmt println
go run main.go

Concepts

• package main
• imports

import "fmt"
fmt.Println("Hello, World")

• Data types - Integers, floating point numbers, strings, Boolean

fmt.Println("1 + 1 = ", 1 + 1) 
fmt.Println("1.0 + 1.0 = ", 1.0 + 1.0)
len("Hello, World")
fmt.Println((true && true)

• Variables

var x string = "Hello"
x := "Hello" // type inference
y := 5.  // type inference
Scope (Declare outside)
const x string = "Hello" // constants
// Multiple variables
var (
  a = 5
  b = 10
)
fmt.println(`
1
2
3
`)