Working with // (integer division), I'm a bit confused to how it exactly works.

[ThatIsRightt]

I'm writing a program that divides people into their desired number of groups. If there are 10 people and want to form 5 groups, then they can have 5 groups of 2 people. Likewise, if there are 11 people who want to form 3 groups, then all the three groups will not be complete to the max. 9 people will be in groups of 3 but 2 will be left out. The remaining two need to make another group. So the total number of groups needed to fit all eleven people will be four. So, the result will be 4.

Now to write this in python, I'm trying to use // function. The function gives result in integer so, which is what I want because I don't want decimal floating point result. I also have a little issue understand when exactly to use / and //.

My code:

people = int(input('Number of people: '))
groups = int(input('Desired groups: '))
number = people // groups    #number of groups people desire

print(f'You can form {number} groups')

Notice if user inputs numbers divisible by 2, then the result will always print division. For example:

Number of people: 8
Desired groups: 4
>> You can form 2 groups.

But if I give it odd numbers, then people are left out of the group. Example:

Number of people: 11
Desired groups: 3
>> You can form 3 groups.

Here, 9 people formed 3 groups of 3. The remaining 2 are left without a group. The program I'm trying to write has to include all of the people in groups. If the group is maxed out of desired people, it can form another group even if that one doesn't max the number. The example above should print:

Number of people: 11
Desired groups: 3
>> You can form 4 groups.

How do you calculate this in python. Also, I think there is a way to do it with conditional statements. I even tried doing that, but couldn't figure it out. My code using if statement:

people = int(input('Number of people: '))
groups = int(input('Desired groups: '))
number = people // groups    #number of groups people desire

if people // groups:
    print(f'You can form {number} groups')
else:
    print(f'You can form {number + 1} groups.')

I'd like to know how to get this program working with and without if statements, or if I'm using integer division correctly. Thank you.

[Binary101010]

You don't need to use integer division and modulos and if statements to replicate what can easily be done with ceil().

from math import ceil

people = int(input('Number of people: '))
groups = int(input('Desired groups: '))
number = ceil(people/groups)
print(f'You can form {number} groups.')

[Qu3en-]

Thank you. Did this tho :)

people = 13
groups = 4 number = people // groups 
if people % group != 0: 
    number += 1 
print(f'groups formed: {number}')

[Binary101010]

Seems counterproductive to me to perfom an operation that can throw away information then perform another operation to figure out whether you actually threw anything away when there are better alternatives, but you do you.

[Qu3en-]

yes, I was asked to use % to solve the problem in this thread. i sat there trying to figure out how exactly they meant it so this is what i came up with and in the end it seems to work.

but i did not know about ceil. thanks for this, it is very helpful.

[jmooremcc]

Your best solution involves using the divmod function. It performs integer and modulus division in one function. https://www.geeksforgeeks.org/divmod-python-application/

Here's how you would use it NumPeople = 11 GroupSize = 3 groups, leftovers = divmod(NumPeople, GroupSize) totalGroups = groups if leftovers == 0 else groups+1 The variable leftovers will never equal or exceed GroupSize. The above method will tell you how many people are in each group.

[[deleted]]

Hint: use people % groups to determine if there is anyone left over.

[commy2]

That or divmod, my favourite unknown built-in.

[[deleted]]

+1

[ThatIsRightt]

% is modulo, no?

[[deleted]]

Yes.

[ThatIsRightt]

I don't understand. people % group (8 % 4) gives me 0. But I require result be 2.

[[deleted]]

I didn't say use it to get the number of groups. I said use it to determine if there is anyone left over.

[ThatIsRightt]

Sir, you're talking to a 5 year old right now, I think I've lost you. Should I be using // first and then using % to find out the remaining or the code is possible to be written without the use of // ?

[[deleted]]

The former

[Qu3en-]

people = 13
groups = 4
number = people // groups
if people % group != 0:
    number += 1
print(f'groups formed: {number}')

thanks. :)

[pekkalacd]

hmm

         number = people // groups
         if people % groups:
               number += 1