How to square numbers in Python, and output as a list

Question

I need to make a list comprehension to create a list of squared numbers. The function has the parameters start and end, and I want it to returns a list of squares of consecutive numbers between start and end inclusively.

I've tried various ways to solve this problem, but I've failed. I have also removed my code, that I wrote in attempts to solve the question.

def squares(start, end):
    return [  ]

print(squares(2, 3)) # Should output [4, 9]
print(squares(1, 5)) # Should output [1, 4, 9, 16, 25]
print(squares(0, 10)) # Should output [0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

Does this answer your question? [How to use a list comprehension to square numbers from start to end?](https://stackoverflow.com/questions/61866543/how-to-use-a-list-comprehension-to-square-numbers-from-start-to-end) — Gino Mempin, Dec 15 '20 at 00:22
That's useful, haha; but this question was posted over 7 months ago; and was answered previously; a long time ago. Although thank you for referring the other answer. — Human Being, Dec 16 '20 at 15:31
That was actually not meant to ask for your response (yeah, the wording is weird). It is an auto-posted auto-comment when flagging a question as a duplicate of another question. — Gino Mempin, Dec 17 '20 at 00:36

score 2 · Answer 1 · answered Apr 21 '20 at 16:36

2

You can do it the following way

def squares(start, end):
    if start > end:
        raise ValueError("start should be less or equal to end")
    return [num**2 for num in range(start, end+1)]

answered Apr 21 '20 at 16:36

vkozyrev

1,770
13
13

1

@human-being It's funny that you asked for a list comprehension solution but marked a different approach as the best answer :) – vkozyrev Apr 22 '20 at 09:33
I'm sorry, he is newer in the community, I just realized today what a list comprehension is and what that was... – Human Being Apr 23 '20 at 19:08
1

Thanks for introduction to" raise ValueError" @vkozyrev – dxander Jun 20 '20 at 19:51

CoderCat · Accepted Answer · 2020-04-21T16:39:13.213

0

You can use this:

def squares(start, end):
    lst = []
    for num in range(start, end+1):
        num = num**2
        lst.append(num)
    return lst

print(squares(2, 3)) # Should output [4, 9]
print(squares(1, 5)) # Should output [1, 4, 9, 16, 25]
print(squares(0, 10)) # Should output [0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

I have tried and it works. Also, you can check this question.

edited Apr 21 '20 at 16:39

answered Apr 21 '20 at 16:37

CoderCat

22
4

I originally wasn't going to give it to you, since you were not the first answer, but since you're a new contributor I'll do so! – Human Being Apr 21 '20 at 16:45
Ah thanks a lot! It was necessary to be able to comment, that's why I asked, thank you. – CoderCat Apr 21 '20 at 16:48

score 0 · Answer 3 · answered Apr 21 '20 at 16:43

0

def squares(start, end):
    result = []
    for  i in range(start,end+1):
        result.append(i**2)
    return result

answered Apr 21 '20 at 16:43

kaungmyathan

11
1
2

How to square numbers in Python, and output as a list

3 Answers3