GeeksforGeeks
geeksforgeeks.org › python › python-program-for-factorial-of-a-number
Factorial of a Number - Python - GeeksforGeeks
Input: n = 6 Output: 720 Explanation: 6! = 6 × 5 × 4 × 3 × 2 × 1 = 720 · Let's explore different methods to find the factorial of a number in Python. This method computes the factorial using Python’s built-in factorial() function, which performs the entire calculation internally without requiring loops or recursion in user code.
Published November 29, 2025
Vultr
docs.vultr.com › python › examples › find-the-factorial-of-a-number
Python Program to Find the Factorial of a Number | Vultr Docs
December 27, 2024 - Multiply the result by each number in the loop. ... def factorial_iterative(n): result = 1 for i in range(1, n + 1): result *= i return result Explain Code · This function takes an integer n and computes its factorial using a for loop.
Videos
AlmaBetter
almabetter.com › bytes › articles › factorial-program-in-python
Factorial Program in Python(Factorial of a Number in Python)
October 19, 2024 - Learn to write a factorial program in Python using for loops, while loops, recursion, and functions with code examples, detailed explanations and use cases ... The factorial of a number is an essential concept in mathematics and programming. It is denoted as n!, which represents the product of all positive integers from 1 to n. For example, the factorial of 5 ...
Programiz
programiz.com › python-programming › examples › factorial
Python Program to Find the Factorial of a Number
If the number is positive, we use for loop and range() function to calculate the factorial. # Python program to find the factorial of a number provided by the user # using recursion def factorial(x): """This is a recursive function to find the factorial of an integer""" if x == 1 or x == 0: ...
The Crazy Programmer
thecrazyprogrammer.com › home › factorial program in python using for and while loop
Factorial Program in Python using For and While Loop
April 12, 2023 - X Factorial of X 1 1 2 2 3 6 4 24 5 120 ... As we know that if we write only num,it will take range (1,num-1)means if we write only num it will range from 1 to num -1. And if we range (1,num+1)it range the number also that you have entered. ... Because if you give only num it will end with ...
Quora
quora.com › How-can-I-calculate-the-factorial-of-a-given-number-using-a-for-loop-in-python-language
How to calculate the factorial of a given number using a for loop in python language - Quora
Answer (1 of 4): Python Program: [code]n = int(input("Enter n:")) fact = 1 for i in range(2, n+1): fact *= i print("Factorial of {} is:{}".format(n, fact)) [/code]Output: Enter n:5 Factorial of 5 is:120
Tutorial Gateway
tutorialgateway.org › python-program-to-find-factorial-of-a-number
Python Program to find Factorial of a Number
March 31, 2025 - number = int(input(" Please enter any Number : ")) fact = 1 for i in range(1, number + 1): fact = fact * i print("The factorial of %d = %d" %(number, fact)) The user entered integer in the above program example is 4. Please refer to math functions, ...
Newtum
blog.newtum.com › factorial-of-a-number-in-python-using-for-loop
Factorial of a Number in Python Using for Loop - Newtum
June 10, 2024 - In this Python exercise, we are ... integrability up to and including that number. For Example, the factorial of 5 is 5 x 4 x 3 x 2 x 1 = 120....
Codingem
codingem.com › home › factorial with a while loop in python
Factorial with a While Loop in Python - codingem.com
April 10, 2023 - Commonly, you see factorial being calculated with a recursion. But it is just as fine to calculate the factorial using an iterative approach, that is, a while or a for loop. If you do not need to implement the factorial yourself, use the built-in math.factorial function in Python.
Top answer 1 of 5
7
I'm pretty sure you meant to apply that tuple to the range function:
Copyfor num in range(1, 6, 1):
Although range(1, 6) will suffice. A step of 1 is the default.
(1, 6, 1) is just a tuple of 3 elements, 1, 6, and 1.
2 of 5
0
You just loop in set has three elements 1,6,1. You should replace by range(1,6).
w3resource
w3resource.com › python-exercises › python-functions-exercise-5.php
Python Exercise: Calculate the factorial of a number - w3resource
# Define a function named 'factorial' ... is 1) return 1 else: # If 'n' is not 0, recursively call the 'factorial' function with (n-1) and multiply it with 'n' return n * factorial(n - 1) # Ask the user to input a number to compute ...
Jaro Education
jaroeducation.com › home › blog › factorial program in python explained with examples
Different Approaches to Compute Factorial Program in Python
April 17, 2025 - In this case, you have to store ... initialises the factorial from 1. To enter within the ‘for loop’, the value of the number must be 1 or greater than 1....
Unstop
unstop.com › home › blog › factorial program in python | examples & complexity analysis
Factorial Program In Python | Examples & Complexity Analysis
February 4, 2025 - Using a while loop, we repeatedly multiply the result by the counter variable and then increment the counter until it exceeds n. The example Python program below showcases this approach.
W3Schools
w3schools.in › python › examples › find-factorial-of-a-number-using-a-loop
Python Program to Find Factorial of a Number Using a Loop
#Taking user input n = int(input("Enter ... 0: #Check if the number is zero print("The factorial of 0 is 1.") else: for i in range(1,n + 1): factorial = factorial*i print("The factorial of",n,"is",factorial)...
Shiksha
shiksha.com › home › it & software › it & software articles › programming articles › how to find the factorial of a number using python
How to Find the Factorial of a Number Using Python - Shiksha Online
August 16, 2024 - Hence, the range of the for loop ... elif n == 0: print("The factorial of 0 is 1") else: for i in range(1, n + 1): fact = fact * i print("The factorial of",n,"is",fact)...
Reddit
reddit.com › r/learnpython › factorials
r/learnpython on Reddit: Factorials
October 11, 2021 -
I have an assignment for class about a topic we never went over. Would appreciate help how to do it.
Write a script that inputs a nonnegative integer and computes and displays is facotrial. Try your script on the integers 10, 20, 30 and even larger values. Did you find any integer input for which Python could not produce an integer factorial value?
I have no idea where to start
Top answer 1 of 3
3
Well. What is Factorial? Factorial 5 is 5! = 1 * 2 * 3 * 4 * 5. All you need is a starting variable that is initialized to 1, and then you need to loop over all numbers from 1 (can be optimized to start at 2) to the_factorial_you_want_to_calculate. For every number that you loop over you multiply your starting variable by that number. After you looped over all the numbers, you have the factorial value in your starting variable.
2 of 3
1
You can use math.factorial for calculation. Once the input number is too large, you well run out of memory to store it, which answers your second question.
Top answer 1 of 5
1
Iterative approach:
def calculate_factorial(n):
factorial = 1
for i in range(1, n + 1):
factorial *= i
return factorial
Recursive:
def calculate_factorial(n):
if n == 0:
return 1
else:
return n * calculate_factorial(n-1)
It would be great if you could share the code that you tried.
2 of 5
0
A possible method using a while loop:
factorial_base = int(input('Enter a positive integer:\n')) # The number to factorialize.
factorial = 1
if factorial_base > 0: # 0! = 1, so if the base is 0, just leave the factorial value as default (1).
while factorial_base != 1:
factorial *= factorial_base
factorial_base -= 1
Essentially, this will multiply 1 by the given number to factorialize (i.e. n), then by (n - 1), then by (n - 2), and so on, until the multiplication factor reaches 1.
Hope this helps.
PYnative
pynative.com › home › python › programs and examples › python programs to find factorial of a number
Python Find Factorial of a Number [5 Ways] – PYnative
March 31, 2025 - Multiply factorial by the current value of the loop counter i. Recursion involves calling the same function within itself to compute the factorial in Python. The function calls itself with a smaller value (n - 1), continuing until it reaches the base case.
Reddit
reddit.com › r/learnpython › just started learning loops and have a question w/ factorial.
r/learnpython on Reddit: Just started learning loops and have a question w/ factorial.
October 14, 2020 -
Just started loops . Seemed pretty straight forward. But I got to this question and though the concept makes perfect sense I can't seem to write the code to do the function. After watching youtube videos, though helpful they were for user input (which we've touched on as well) but not what the question is asking. Im confused by the "!" Whether I should be putting that somewhere. Everywhere it would make sense for the operator I get an error. And I realize I am doing it wrong I need to count down 5*4*3*2*1 but I'm doing 5*5. Thats because Im trying to figure out how to get a single number. Should I be making another variable = int(input()? Thanks for any help.
mystery_int = 5
#You may modify the lines of code above, but don't move them!
#When you Submit your code, we'll change these lines to
#assign different values to the variables.
#In math, factorial is a mathematical operation where an
#integer is multipled by every number between itself and 1.
#For example, 5 factorial is 5 * 4 * 3 * 2 * 1, or 120.
#Factorial is represented by an exclamation point: 5!
#
#Use a for loop to calculate the factorial of the number
#given by mystery_int above. Then, print the result.
#
#Hint: Running a loop from 1 to mystery_int will give you
#all the integers you need to multiply together. You'll need
#to track the total product using a variable declared before
#starting the loop, though!
#Add your code here!
for i in range(mystery_int,mystery_int +1):
i *= mystery_int
print(i * mystery_int)