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+--- Thread: num+1 (/thread-38463.html)
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num+1 - astral_travel - Oct-16-2022
hi,
in the following code:
__author__ = 'jeffreyhunt'
num = int(input("Please choose a number to divide: "))
listRange = list(range(1,num+1))
divisorList = []
for number in listRange:
if num % number == 0:
divisorList.append(number)
print(divisorList)what is the meaning of num+1 ?
RE: num+1 - ndc85430 - Oct-16-2022
The
stop parameter is excluded (that is, the final value in range(1, num) will be num - 1). So if you want a range from 1 up to and including num, you need to pass num + 1 for stop.Docs for ranges: https://docs.python.org/3/library/stdtypes.html#typesseq-range.
RE: num+1 - astral_travel - Oct-16-2022
alright ! i got it !
okay i have another question:
when i execute the following code:
user_number = int(input("please choose a number to check: "))
list1 = range(2, user_number+1)
list2 = []
for x in list1:
if user_number % x == 0:
list2.append(x)
print(list2)it gives me the following output:Output:please choose a number to check: 30
[2]
[2, 3]
[2, 3, 5]
[2, 3, 5, 6]
[2, 3, 5, 6, 10]
[2, 3, 5, 6, 10, 15]
[2, 3, 5, 6, 10, 15, 30]
Process finished with exit code 0i mean, why doesn't it just write the last result ? (the last line) ?
like, simply: [2, 3, 5, 6, 10, 15, 30]
RE: num+1 - snippsat - Oct-16-2022
print is inside the loop,so will show results for every iteration.
user_number = int(input("please choose a number to check: "))
list1 = range(2, user_number+1)
list2 = []
for x in list1:
if user_number % x == 0:
list2.append(x)
print(list2)
RE: num+1 - astral_travel - Oct-16-2022
yep - that fixed it,
amazing how little things make big changes...
thank you very much to both of you !
RE: num+1 - astral_travel - Oct-16-2022
can you help me with this also ?
when this code is being executed:
def tri_recursion(k):
if(k > 0):
result = k + tri_recursion(k - 1)
print(result)
else:
result = 0
return result
print("\n\nRecursion Example Results")
tri_recursion(6)it gives the following output:Output:Recursion Example Results
1
3
6
10
15
21 couldn't wrap my head around this...is there an explanation to it
RE: num+1 - ndc85430 - Oct-16-2022
What, in particular, are you stuck on? What is your current understanding of how it works?
RE: num+1 - Yoriz - Oct-16-2022
You can step through the code using this code visualizer
RE: num+1 - astral_travel - Oct-16-2022
Yoriz thank you very much for the code visualizer, it helps allot !
ndc, what i don't understand is the "game" of numbers that runs in the loop,
i don't totally understand the concept of recursion and so it is another subject that i'm having difficulty with...
i don't understand why the output is what it is...
what mostly i'm stuck with is the line:
result = k + tri_recursion(k - 1)
if k runs 6 times, beginning with 6 - and so it is: 6 + (6-1) (should equal 11...but no 11 in output)
i'm surely missing something here, but i don't know what it is..
RE: num+1 - Larz60+ - Oct-17-2022
the function is recursive, so result doesn't get displayed until all iterations are complete (because the next iteration is called if k is greater than zero).
Add a print statement to show value of k on each iteration, and this becomes clear:
def tri_recursion(k):
if(k > 0):
print(f"k: {k}")
result = k + tri_recursion(k - 1)
print(result)
else:
result = 0
return result
print("\n\nRecursion Example Results")
tri_recursion(6)Output:Recursion Example Results
k: 6
k: 5
k: 4
k: 3
k: 2
k: 1
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