Similar reason. You might want to read about slices and arrays in go: https://golang.org/doc/effective_go.html#slices
This might be helpful as well: https://gobyexample.com/slices On 3/8/19, Halbert.Collier Liu <halbert.coll...@gmail.com> wrote: > Yes, i see, > thank you so much! > > Could you please explain, why primes[6:6] okay, but primes[7:7] not? > *:-)* > > > 在 2019年3月7日星期四 UTC+8下午11:55:40，Robert Johnstone写道： >> >> Hello, >> >> When you use the colon, you taking a subset of the data. Further, the >> notation is a closed/open. So a slice primes[6:6] is all of the element >> in >> the array with index >= 6 and index < 6, which is an empty set. Note that >> >> the type of the expression primes[6:6] is []int. >> >> When you don't use the colon, you are access a specific element. Since >> the count is zero based, the valid indices are 0 through 5 inclusive. >> Note >> that the type of the expression primes[6] is simply int. >> >> Good luck. >> >> >> On Thursday, 7 March 2019 10:32:04 UTC-5, Halbert.Collier Liu wrote: >>> >>> Hi. >>> >>> The code like below: >>> >>> package main >>> >>> import "fmt" >>> >>> func main() { >>> primes := [6]int{2, 3, 5, 7, 11, 13} >>> fmt.Println(primes[6:6]) . // *OK*. return: [] >>> //fmt.Println(primes[6]) . // fail. out of bounds... >>> } >>> >>> Why? >>> >>> Is the golang grammatical feature? or anything else.. >>> >>> Any help, please! >>> >> > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
