Function main

hellogo.go:289–1182

When a Go program executes it executes a function named main Go statements don't require semicolons

()

// When a Go program executes it executes a function named main
// Go statements don't require semicolons
func main() {
	// Prints text and a newline
	// List package name followed by a period and the function name
	pl("Hello Go")

	// Get user input (To run this in the terminal go run hellogo.go)
	pl("What is your name?")
	// Setup buffered reader that gets text from the keyboard
	reader := bufio.NewReader(os.Stdin)
	// Copy text up to the newline
	// The blank identifier _ will get err and ignore it (Bad Practice)
	// name, _ := reader.ReadString('\n')
	// It is better to handle it
	name, err := reader.ReadString('\n')
	if err == nil {
		pl("Hello", name)
	} else {
		// Log this error
		log.Fatal(err)
	}

	// ----- VARIABLES -----
	// var name type
	// Name must begin with letter and then letters or numbers
	// If a variable, function or type starts with a capital letter
	// it is considered exported and can be accessed outside the
	// package and otherwise is available only in the current package
	// Camal case is the default naming convention

	// var vName string = "Derek"
	// var v1, v2 = 1.2, 3.4

	// Short variable declaration (Type defined by data)
	// var v3 = "Hello"

	// Variables are mutable by default (Value can change as long
	// as the data type is the same)
	// v1 := 2.4

	// After declaring variables to assign values to them always use
	// = there after. If you use := you'll create a new variable

	// ----- DATA TYPES -----
	// int, float64, bool, string, rune
	// Default type 0, 0.0, false, ""
	pl(reflect.TypeOf(25))
	pl(reflect.TypeOf(3.14))
	pl(reflect.TypeOf(true))
	pl(reflect.TypeOf("Hello"))
	pl(reflect.TypeOf('🦍'))

	// ----- CASTING -----
	// To cast type the type to convert to with the variable to
	// convert in parentheses
	// Doesn't work with bools or strings
	cV1 := 1.5
	cV2 := int(cV1)
	pl(cV2)