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How to Find Cubes in Python Made Easy | Python Beginner Exercise
Sep 14, 2025
Welcome to PyBeginners – your go-to place to learn Python programming the easy way! 🚀 In this video, you’ll learn how to find cubes in Python step by step. 🚀 This beginner-friendly Python exercise will help you practice loops, arithmetic operations, and logic building in Python. 👉 What you’ll learn: How to calculate cubes of numbers in Python Using for loop and while loop for cube calculation Writing simple and clean Python code Building problem-solving skills with Python exercises This tutorial is perfect for beginners who want to strengthen their Python basics while practicing coding challenges. 💡 🔔 Subscribe for more Python exercises and tutorials designed for beginners! Whether you're starting from scratch or revisiting the basics, this channel is built just for YOU. We break down Python concepts into bite-sized, beginner-friendly videos using real-life examples, everyday language, and fun visuals.
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0:00
Hey everyone, welcome back to simplified
0:02
by Singom. Welcome to our Python for
0:04
beginners series. Today we are going to
0:07
explore something really fun which is
0:09
finding cubes of numbers. In the
0:11
previous exercise we worked with squares
0:12
of numbers. And now you might be
0:15
wondering what's a cube? Well, just like
0:17
a square is actually a number multiplied
0:20
by itself. In the same way, a cube is a
0:22
number multiplied by itself three times.
0:26
Like for example 2 cube is nothing but 2
0:31
is multiplied by 3 * 2 into 2 into 2 is
0:35
8 2 into 2 4 4 into 2 8
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and simply 4 cq 4 into 46 16 into 4 64
0:44
so that is nothing but 4 cube pretty
0:46
cool right now let's see how to write a
0:49
python program that does this
0:51
automatically for us
0:54
and first here is the idea idea we have
0:57
to ask the user how many numbers they
1:00
want to find cubes for and then we ask
1:03
them to type in each number one by one
1:06
using the loop and finally for each
1:09
number Python will calculate the cube
1:12
using simple multiplication and then we
1:14
print the result in a nice format. So
1:19
basically we are teaching Python how to
1:21
be our personal cube calculator.
1:25
All right, let's score this step by step
1:32
and n equal to int of input.
1:40
Enter
1:41
how many
1:44
numbers you want.
1:51
Okay. And then in the same way we create
1:55
numbers in the it is almost same as the
1:58
previous exercise. So we have already
2:01
done this before. And now we create a
2:04
loop to get
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the numbers
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from the user.
2:14
And for i in range of
2:20
1, n + one.
2:26
And here let's create a variable called
2:28
m equal to int of input.
2:36
Enter number
2:39
i.
2:42
And we'll add those numbers into our
2:46
numbers list using append.
2:53
So here we took how many numbers the
2:55
user want to enter and then we created
2:57
an empty list called numbers and for i
3:02
in range of 1 comma n + one like for
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example user gave two numbers to add. So
3:08
we created an empty list and for i in
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range of
3:13
1 comma
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what is the 2 + 1 which is nothing but
3:18
three. So for I in range of 1, 3.
3:22
So then it will create a variable
3:26
called num. And then it is asking the
3:29
user enter number one, enter number two,
3:32
enter number three, something like that.
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We are actually taking the user input
3:36
for every loop for every time. Okay? And
3:41
then we will print
3:45
numbers so that you will see how this
3:48
exactly works
3:54
like for example
4:01
when I give two numbers I want to enter
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enter number one. See it is asking me
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the first number maybe two and second
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number maybe three. But let me give a
4:12
space here so that you can understand
4:16
better.
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So two numbers number one two number two
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maybe four. See it is creating a list
4:28
called numbers and it is adding every
4:30
time the user gave the value. So here we
4:34
are taking the input from the user and
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at the same time in the next line itself
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we are adding that particular number
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whatever the number that user gives into
4:45
this numbers list. How? By using this
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append method.
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So this is how we get user input for
4:53
every loop using for loop.
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So this is just to understand and now
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let's create a headline to create
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this slash in is nothing but it will
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show us the output in the next line.
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That's the only thing we use slash for.
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So just create a headline cubes
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of the entered numbers
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and then we'll write logic
5:27
to calculate
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the cubes.
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You calculate and print
5:38
the cubes.
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up.
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So the logic will be for again in order
5:52
to grab each and every number from the
5:56
list per num in numbers.
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We will just print.
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We will just print
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again use f strings
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num
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cube
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is equal to
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simple just multiply the number by three
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times to get the cube num into num into
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num and yeah that's it and this will
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this logic will give you the cube of a
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number as simple as that.
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So like for example user gave two
6:41
numbers and those two numbers are added
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here. So now the numbers value is
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for example let's take the same example
6:51
2a 4. So these are the numbers. So now
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it will print the cubes of the enter
6:57
numbers and for num in numbers
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that means it will go to each and every
7:04
item in the loop. We are instantly
7:07
creating a variable at that particular
7:09
time when you're looping when you're
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doing looping in a list. So at that time
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you are instantly creating a variable
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called num so that it can grab a number.
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It can grab a particular thing from the
7:22
list at one particular time. So
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initially it starts with 2 and it will
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print 2 cube is equal to 2 into 2 into
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2. So it will give you the calculation
7:35
of 2 into 2 into 2 which is nothing but
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8. And now again
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the number once it is done now the
7:43
interpreter goes again here. Now the
7:45
number value changes from 2 to 4. Okay.
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And now it will print 4 cube = 4 into 4
7:52
into 4 which is nothing but 64.
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So overall what's happening here we are
7:59
taking the input from the user to ask
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how many numbers the user want to
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calculate and then we are creating an
8:06
empty list where we will store the
8:09
numbers and in the first loop for i in
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range of 1 n + 1 it takes each number
8:15
from the user and saves it inside that
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list which is numbers
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and then we print a heading called cubes
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of the entered numbers.
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And finally, the second loop goes
8:28
through each number in the list,
8:30
multiplies it by itself for about three
8:33
times, and prints the cube in a need
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format.
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Simple and clear. Okay, now let's run
8:41
it.
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For example,
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I want to give three numbers
8:52
2 4 5. So the cubes of entered numbers
8:57
is 2 cube, 4 cube and 5 cube. If you
9:01
want you can give you can remove the
9:05
space and you can do it again.
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You can give whatever the output that
9:14
you want.
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5 cube is 125
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and 7 cube is
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343.
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And yeah that's all. So today you
9:30
learned how to take multiple inputs from
9:32
the user and show them inside a list. We
9:35
have done it even in the squares of a
9:37
number in the previous exercise as well.
9:39
We also learned how to use loops to
9:41
perform calculations and also print out
9:44
cubes of numbers in a good way using
9:46
frstrings.
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And here is a little challenge for you.
9:50
Try modifying this program to also print
9:53
squares and cubes together. Like for
9:55
example, 2 square is 4 and 2 cube is 8.
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And that will be a fun extra step to
10:02
practice with. And if you enjoyed the
10:06
tutorial, don't forget to like this
10:07
video, subscribe to the channel, and hit
10:09
that notification bell so you'll always
10:12
always stay ahead in our Python learning
10:14
journey. And remember, coding is like
10:17
building blocks. Once you understand the
10:19
basics, you can create anything.
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See you in the next video and until
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then, keep coding and keep smiling.