go declaration code example

Example 1: go declarations

var foo int // declaration without initialization
var foo int = 42 // declaration with initialization
var foo, bar int = 42, 1302 // declare and init multiple vars at once
var foo = 42 // type omitted, will be inferred
foo := 42 // shorthand, only in func bodies, omit var keyword, type is always implicit
const constant = "This is a constant"

Example 2: go variable default

Variables declared without an explicit initial value are given their zero value.

The zero value is:

0 for numeric types,
false for the boolean type, and
"" (the empty string) for strings.