Golang: How do I convert command line arguments to integers?

I want to make a script that does an insertion sort on the arguments provided by the user, like this:

    $ insertionSort 1 2 110 39

I expect it to return:

    [1 2 39 110]

But it returns:

    [1 110 2 39]

I think it's because the elements in the os.Args array are strings. So, my question is how do I convert the elements of the os.Args array into integers? Here's my code:

    package main
    import (
        "fmt"
         "os"
         "reflect"
         "strconv"
    )
    func main() {
        A := os.Args[1:]
        for i := 0; i <= len(A); i++ {
	      strconv.Atoi(A[i])
	      fmt.Println(reflect.TypeOf(A[i]))
        }
     
         for j := 1; j < len(A); j++ {
	         key := A[j]
	         i := j - 1
	         for i >= 0 && A[i] > key {
		       A[i+1] = A[i]
		       i = i - 1
		       A[i+1] = key
	         }
          }
        fmt.Println(A)
    }

As a heads up, when I substitute

     strconv.Atoi(A[i])

For

     A[i] = strconv.Atoi(A[i])

I get the following error:

    ./insertionSort.go:14: multiple-value strconv.Atoi() in single-value context

Thank you for your time!

Atoi returns the number and an error (or nil) from

> ParseInt interprets a string s in the given base (2 to 36) and returns the corresponding value i. If base == 0, the base is implied by the string's prefix: base 16 for "0x", base 8 for "0", and base 10 otherwise.

> The bitSize argument specifies the integer type that the result must fit into. Bit sizes 0, 8, 16, 32, and 64 correspond to int, int8, int16, int32, and int64.

> *The errors that ParseInt returns have concrete type NumError and include err.Num = s. If s is empty or contains invalid digits, err.Err = ErrSyntax and the returned value is 0; if the value corresponding to s cannot be represented by a signed integer of the given size, err.Err = ErrRange and the returned value is the maximum magnitude integer of the appropriate bitSize and sign.

You need to do :

var err error
nums := make([]int, len(A))
for i := 0; i < len(A); i++ {
	if nums[i], err = strconv.Atoi(A[i]); err != nil {
		panic(err)
	}
	fmt.Println(nums[i])
}

Working example : http://play.golang.org/p/XDBA_PSZml