go_in_12_mins.md

Go in 12 minutes

These are notes from a youtube video of the same name

Workspace

By default its ~/go

You can determine via

$ go env GOPATH
/Users/davis/go

Using the workspace

Note, you can put code in that same dir, but you can also use the src dir as done here.

$ cd src
$ mkdir go12m
$ cd go12m
$ vi go12m.go

Add the following code

package main

import "fmt"

func main() {
	fmt.Println("yo")
}

Run the code in one step. Note, this will not create an exe file like would happen if you did a separate compile (go mod; go build) step.

$ go run go12m.go

Building the code to make an exe is like this:

$ go mod init go12m
$ go mod tidy
$ go build

You can also do an install. This will put the executable in the ~go/bin directory.

$ go install

Variables

// var name type
var value int
// init a value
var my_pi  int = 3.14
// Shorthand for initialized value (type is inferred)
my_pi2 := 3.14

if statements

let x int = 6
if x > 6 {
	fmt.Println("More than 6")
} else if x < 2 {
	fmt.Println("Less than 2")
} else {
	fmt.Println("<= 6 and >= 2")
}