模板中的for循环

I need for loop in template.

for i := start; i < finish; i++ {
    // do something
}

Is it just one way by using range with prepared array or how can I add this functional to templates?

The simplest way is probably to use range and an external function. For example (On play):

func For(start, end int) <-chan int {
    c := make(chan int)
    go func() {
        for i := start; i < end; i++ {
            c <- i
        }
        close(c)
    }()
    return c
}

in the template:

{{range For 0 10}}
i: {{.}}
{{end}}