Infinite loop in Go

The program in the question starts with cap(emptySlice) == 3. Given that each complete iteration of the loop appends a new value to empty slice, we know that cap(emptySlice) >= 3 + i. It follows that the loop does not terminate.

My homework assignment is slightly different: Read up to three integers and print them in sorted order. Here's how I did it:

func main() {
    var result []int
    scanner := bufio.NewScanner(os.Stdin)
    for i := 0; i < 3; i++ {
        fmt.Printf("Please enter a number: ")
        if !scanner.Scan() {
            // Exit on EOF or other errors.
            break
        }

        n, err := strconv.Atoi(scanner.Text())
        if err != nil {
            // Exit on bad input.
            fmt.Println(err)
            break
        }
        result = append(result, n)
    }

    sort.Ints(result)
    fmt.Println(result)
}

I think there are a couple of minor bugs, but this version should work correctly:

package main

import "fmt"
import "bufio"
import "strconv"
import "os"
import "sort"

func main() {
    emptySlice := make([]int, 3) // Capacity of 3
    fmt.Println(cap(emptySlice))
    scanner := bufio.NewScanner(os.Stdin) // Creating scanner object

    for i := 0; i < cap(emptySlice); i++ { // Should this not run 3 times?
        fmt.Printf("Please enter a number: ")
        scanner.Scan() // Will always scan in a string regardless if its a number

        input, err := strconv.ParseInt(scanner.Text(), 10, 16)
        if err != nil {
            fmt.Println("Not a valid entry! Ending program")
            break
        }
        // emptySlice = append(emptySlice, int(input)) // adds input to the slice
        emptySlice[i] = int(input)
    }

    sort.Ints(emptySlice)   // sorts the slice
    fmt.Println(emptySlice) // Prints the slice

}

I've moved the prompt into the loop, and I've replaced the append call with a direct assignment to the previously allocated slice entries. Otherwise calling append will just increase the size of the slice.

I've moved the sort and the print outside of the loop, as these seemed to be incorrectly placed too.