Learn X By Example
Learn X By Example

    Go by Example: Variables

    Go by Example : Variables

    In Go, variables are explicitly declared and used by the compiler to e.g. check type-correctness of function calls.

    package main
    import "fmt"
    func main() {

    var declares 1 or more variables.

        var a = "initial"
    fmt.Println(a)

    You can declare multiple variables at once.

        var b, c int = 1, 2
    fmt.Println(b, c)

    Go will infer the type of initialized variables.

        var d = true
    fmt.Println(d)

    Variables declared without a corresponding initialization are zero-valued . For example, the zero value for an int is 0 .

        var e int
    fmt.Println(e)

    The := syntax is shorthand for declaring and initializing a variable, e.g. for var f string = "apple" in this case. This syntax is only available inside functions.

        f := "apple"
    fmt.Println(f)
}
    $ go run variables.go
initial
1 2
true
0
apple

    Next example: Constants .

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    Go by Example: Values
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    Go by Example: Variadic Functions