import (
"fmt"
"strconv"
)
var numbers = []int{2, 3, 5, 7, 11, 13, 17}
var str = ""
for i := range numbers {
if len(str) > 0 {
str += "; "
}
str += strconv.Itoa(numbers[i])
}
//str is "2; 3; 5; 7; 11; 13; 17"
fmt.Println(str)