A usage of encapsulation of a clousre for Saman

closure_encapsulation.go

package main

import "fmt"

func main() {
    // this is a function which accept an int and return a function which accept an int and return an int :D
    var add func(int) func(int) int = func(n int) func(int) int {
        return func(a int) int {
            return a + n
        }
    }

    add5 := add(5)
    fmt.Println(add5(4))

    add10 := add(10)
    fmt.Println(add10(3))
}

// meysampg@freedom:~/www/test/closure-go 
// $ go build main.go
// 
// meysampg@freedom:~/www/test/closure-go 
// $ ./main     
// 9
// 13