I try to write below code in Ubuntu. i want to return 5 even number which is greater than 3, idealy it should get the list of 4,6,8,10,12. but it
only return 4,6,8,10. anything wrong? thanks.
def evennumber(m,n):
st = []
for i in range(m-1,n+1):
st.append(2*i)
for x in range(len(st)):
print (st[x])


if __name__=='__main__':
evennumber(3,5)

you ought to use code tags, otherwise the python script is actually unreadable.

yes, i use correct indention, but result is wrong. ii believe something else is wrong

You need to use code tags. Edit your original post and insert them. That will fix this indentation issue.

Look at how the range function actually works.
https://www.w3schools.com/python/ref_func_range.asp

Since this is clearly a homework/learning question, I'll provide the following pointers:

The simpler a piece of code is, the less likely it is to go wrong, (and the easier it is to find when something does go wrong). Think about your current code and see if there any ways you can come up with to reduce the amount of code you have, in order to achieve the same thing in fewer steps, and help narrow down which part isn't behaving as you expected.

With that in mind, take a closer look at the documentation for range.

Also, remember, the print function accepts all types of objects, and can even accept multiple arguments.

A temporary print statement can be a useful way to debug things (i.e. understand what the code is actually doing). For example, see if there are any places where putting "print('i',i)" helps you understand what is happening.

There is a lot of helpful documentation at docs.python.org, especially the Library and Language references. The official documentation is almost always the best place to start.


When posting on forums, you need to use "[code]..[/code]" tags to preserve formatting.

On your first post you will see an "Edit" button in the bottom right corner (between "Report" and "Quote" - use that and you can ensure the forum displays the indentation as you provided it, which helps other users read your code. (The easier it is for people to read code and answer questions, the more likely people will do so.)

Using your example:

To build linux from scratch one needs 3 or 4 Python installed and to juggle files so programs know which is installed. And it's getting worse.

Simple programs written in python2 cannot print() when python3 is installed. The languages continually mutates so that old code no longer works.

@xlfs-0.2 This thread is not about building LFS, and no-one has said anything about Python 2. Your "contribution" is worthless. Go away.

(And for your edification: that program works the same in both Python 2 and 3).

OP:

Let me a assume you formatted it like this:

The first range would be range(2, 6). Which would be 2, 3, 4, 5. The first argument to range is considered inclusive and the last would be considered exclusive. If I recall my math correctly: [2, 6). See the problem?