Adding Numbers to a list using variable

Question

I'm doing a programming question and I need a bit of help. I have a variable where I type in a number and then that number and all the numbers before it go in a list.

For example: I pick 10 and put it in a variable

And all numbers from 1 - 10 are put in a list

Here is my code:

 Top_Num = int(input('Top Number'))
 Nums = []

Now lets say I chose 10 for the Top_Num, how do I put 10 numbers into the list? Thanks.

challett · Accepted Answer · 2015-02-06 01:30:55Z

3

You can actually use Pythons built in range(int) function to do exactly this.

If you want the array to start at 1 and include the input number, you can use

Nums = list(range(1, Top_Num + 1))

The first argument of 1 indicates the start value of the array, and the second argument Top_Num + 1 is the number that the array goes up to (exclusive).

edited Feb 6, 2015 at 1:30

answered Feb 6, 2015 at 1:24

challett

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1 Comment

xnx Over a year ago

On Python 3, you'll need to explicitly cast your range to a list: list(range(1, Top_Num+1))

flyingjam · Accepted Answer · 2015-02-06 01:31:26Z

2

Nums = [num for num in range(1, Top_Num + 1)]

It uses list comprehensions too, which is (kinda) an important concept in python.

answered Feb 6, 2015 at 1:31

flyingjam

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