Learn X By Example
Learn X By Example

    Go by Example: Functions

    Go by Example : Functions

    Functions are central in Go. We’ll learn about functions with a few different examples.

    package main
    import "fmt"

    Here’s a function that takes two int s and returns their sum as an int .

    func plus(a int, b int) int {

    Go requires explicit returns, i.e. it won’t automatically return the value of the last expression.

        return a + b
}

    When you have multiple consecutive parameters of the same type, you may omit the type name for the like-typed parameters up to the final parameter that declares the type.

    func plusPlus(a, b, c int) int {
    return a + b + c
}
    func main() {

    Call a function just as you’d expect, with name(args) .

        res := plus(1, 2)
    fmt.Println("1+2 =", res)
        res = plusPlus(1, 2, 3)
    fmt.Println("1+2+3 =", res)
}
    $ go run functions.go 
1+2 = 3
1+2+3 = 6

    There are several other features to Go functions. One is multiple return values, which we’ll look at next.

    Next example: Multiple Return Values .

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