Udemy: Go Bootcamp
Code: https://github.com/inancgumus/learngo
Configure VS Code
Open VS Code; from the extensions tab at the left, search for "go" and install it
Close VS Code completely and open it up again
Go to View menu; select Command Palette
- Or just press cmd+shift+p
Type: go install
- Select "Go: Install/Update Tools"
- Check all the checkboxes
After it's done, open the Command Palette again
- Type: shell
- Select: "Install 'code' command in PATH"
NOTE: You don't have to do this if you're on Windows.
7. What is GOPATH?
go env to see all go env set
go env PATH to see the $GOPATH
$GOPATH in $HOME/go
10. Compile with "go build"
go build compiles your code
./mygocodeto run after compile
go help build to see help
12. Run with "go run"
go run compiles and runs your code
go help run to see help
go run -x myprog.go will show additional info e.g. package imports
13. ★ FIRST GO PROGRAM EXERCISES ★
🚢 3d10061
Exercise: fmt.Println
diff --git a/learngo/02-write-your-first-program/exercises/01-print-names/main.go b/learngo/02-write-your-first-program/exercises/01-print-names/main.go
index 5972806..4f228f5 100644
--- a/learngo/02-write-your-first-program/exercises/01-print-names/main.go
+++ b/learngo/02-write-your-first-program/exercises/01-print-names/main.go
@@ -8,6 +8,8 @@
package main
+import "fmt"
+
// ---------------------------------------------------------
// EXERCISE: Print names
//
@@ -24,6 +26,6 @@ package main
// ---------------------------------------------------------
func main() {
- // ?
- // ?
+ fmt.Println("Arafat")
+ fmt.Println("Sally")
}🚢 b745f3e
fmt.Prinln and Print can take multiple params
diff --git a/learngo/02-write-your-first-program/exercises/01-print-names/main.go b/learngo/02-write-your-first-program/exercises/01-print-names/main.go
index 4f228f5..d4c7def 100644
--- a/learngo/02-write-your-first-program/exercises/01-print-names/main.go
+++ b/learngo/02-write-your-first-program/exercises/01-print-names/main.go
@@ -26,6 +26,6 @@ import "fmt"
// ---------------------------------------------------------
func main() {
- fmt.Println("Arafat")
+ fmt.Print("My name is ", "Arafat\n")
fmt.Println("Sally")
}🚢 ccb74ac
fmt.Println will accept double quote and backtick, but not single quote
diff --git a/learngo/02-write-your-first-program/exercises/01-print-names/main.go b/learngo/02-write-your-first-program/exercises/01-print-names/main.go
index d4c7def..f0a7b10 100644
--- a/learngo/02-write-your-first-program/exercises/01-print-names/main.go
+++ b/learngo/02-write-your-first-program/exercises/01-print-names/main.go
@@ -26,6 +26,6 @@ import "fmt"
// ---------------------------------------------------------
func main() {
- fmt.Print("My name is ", "Arafat\n")
+ fmt.Print(`My name is Arafat\n`)
fmt.Println("Sally")
} package and import declarations must come at top
14. ⭐️ Packages ⭐️
17. What is a package?
Rules
- all package files should be in the same directory
- all files in the same folder should be in the same package
- ie
package "mypkg"
- ie
package "main"to make it executable
18. Learn the differences between Executable and Library Packages
An executable package
- should be part of
package "main" - also include a
func main() - cannot be imported
A Library Package
- has a
package "mypackage" - cannot be executable directly
- can be
import "mypackage"in other packages
19. Scopes: What is the importance of names?
There are package, file, func, and block scopes that are unique within the scope
package "main"
import "fmt" // file scoped (visible in this file)
const ok = true // package scoped: visible to all files in the package
// not available to other packages unless imported
func nope() {
const notok = false
}
func main() {
var hello = "Hello!" // block scoped declaration
fmt.Println(hello, ok) // "ok" from declaration above
fmt.Println(hello, notok) // ERR: notok declared in func nope() scope
}21. The same names in the same package
xxx