Python - Create a List Starting at a Given Value and End at Given Length

Question

How can I create a list that will have a starting value and length of the list. For example, if I wanted to make a list starting at 17 that was of length 5:

num_list = [17, 18, 19, 20, 21]

I have tried the following however it is not producing the correct results

def answer(start, length):
id_arr = list(range(start, length))
print(id_arr)

answer(17, 10)

Output: []

And I understand the reason for this because, the starting value, in this case, is 17, however, it is trying to end at value 10 thus creating an empty list so how can I make the value of length be the size of the list and not the ending value of the list?

Answer 1

range function itself does all that for you.

range(starting value, endvalue+1, step)

so you can go for range(17,22)

If you writing custom function then go for:

def answer(start, length):
    id_arr = list(range(start, start+length))
    print(id_arr)

answer(17, 5)

output :
[17, 18, 19, 20, 21]

Answer 2

in your def

id_arr = list(range(start, start+length))

should give you the desired result