<p>Hi i am currently learning go and tried to write a function which takes a slice of integers and sums them up.</p>
<p>My function looks like this:</p>
<p><a href="https://gist.github.com/Rapdrei/112b713e7f3b1dd583143db0280744a5" rel="nofollow">https://gist.github.com/Rapdrei/112b713e7f3b1dd583143db0280744a5</a></p>
<p>Surprisingly it sums just the first n-1 elements of the slice and leaves the last one. Any idea what i am missing here?</p>
<p>best</p>
<hr/>**评论：**<br/><br/>dgryski: <pre><p>You're ranging over the indices not the values. Use the two-valued form of the range.</p></pre>rap3: <pre><p>Thank you! :)</p></pre>mywillislaw: <pre><p>Two ways to approach the issue. I'd like to point out that the way dgryski suggests( the later is the examples below) incurs overhead through copying while the former uses the value directly. I will probably get banned for constructive criticism of such a naive comment by dgryski, just like I have in the past....</p>
<pre><code>package main
import "fmt"
func main() {
sum(1, 2, 3, 4, 6)
}
func sum(input ...int) int {
sum := 0
for i := range input {
sum += input[i]
}
fmt.Println("sum was ", sum)
return sum
}
package main
import "fmt"
func main() {
sum(1, 2, 3, 4, 6)
}
func sum(input ...int) int {
sum := 0
for _, i := range input {
sum += i
}
fmt.Println("sum was ", sum)
return sum
}
</code></pre></pre>
