The following code segment is supposed to display all of the elements in a list with dashes between them. For example, if values contains [1, 2, 3, 4, 5] then the program should display 1-2-3-4-5.

result = ""

for i in range(len(values)) :

   if i > 0 :

      _____________________

   result = result + str(values[i])

print(result)

What line of code should be placed in the blank to achieve this goal?