Ποια είναι τα πλεονεκτήματα και τα μειονεκτήματα της γρήγορης δήλωσης μεταβλητής και της δήλωσης μέσω της λέξης-κλειδιού var;

/speedy-announce-:=-is-possible-only-inside-functions-and-is-a-shortened-form-of-declaration-and-initialization.-The-keyword-var-allows-declaring-variables-of-any-type-without-initialization-(they-will-receive-a-zero-value)-or-with-initialization-as-well-as-at-the-package-level.

Main-differences:

Characteristic	Speedy-declaration-:=	Declaration-through-var
Place-of-use	Only-inside-functions	Inside-functions-and-at-package-level
Need-for-initialization	Mandatory,-compiler-infers-type	Not-mandatory,-variable-will-get-zero-value
Multiple-declaration	Possible-for-multiple-variables	Possible-for-multiple-variables
Re-declaration	No,-if-variable-already-exists-(only-assignment)	Yes,-but-only-with-type-specification
Explicit-type-indication	No,-compiler-infers	Yes,-if-no-initialization

Example-of-speedy-declaration:

// Initialization-and-declaration-of-user-variable
user := "Alice"

Example-of-declaration-through-var:

// Declaration-of-age-variable-without-initialization-(will-get-zero-value)
var age int

// Declaration-and-initialization-of-city-variable
var city string = "New York"

// Declaration-of-multiple-variables
var (
	x, y int = 1, 2
	name string
)