But I want to do this with a while loop (no function). A for loop can be rewritten as a while loop. Set up your initial value for i before the loop; use the while condition to detect when i reaches its limit; increment i inside the loop. factorial = factorial * num. num = num - 1. If you just want to get a result: math.factorial (x) While loop:

Apr 8, 2025 · The factorial of a number is the product of all positive integers less than or equal to that number. For example, the factorial of 5 (denoted as 5!) is 5 × 4 × 3 × 2 × 1 = 120. In Python, we can calculate the factorial of a number using various methods, such as loops, recursion, built-in functions, and other approaches.

Jan 6, 2022 · The easiest way is to use math.factorial (available in Python 2.6 and above): If you want/have to write it yourself, you can use an iterative approach: fact = 1. for num in range(2, n + 1): fact *= num. return fact. or a recursive approach: if n < 2: return 1. else: return n * factorial(n-1)

1. Take a number from the user. 2. Initialize a factorial variable to 1. 3. Use a while loop to multiply the number to the factorial variable and then decrement the number. 4. Continue this till the value of the number is greater than 0. 5. Print the factorial of the number. 6. Exit.

Mar 7, 2024 · In this approach, a while loop is used to create the factorial. It’s quite similar to the for loop method but uses a while loop instead, decrementing the number each time until it reaches 1. Here’s an example: Output: 120. This function, factorial(num), also computes the factorial of …

To use a while loop to find the factorial of a number in Python: Ask a number input. Initialize the result to 1. Start a loop where you multiply the result by the target number. Reduce one from the target number in each iteration. End the loop once the target number reaches 1. …

Mar 12, 2021 · When it is required to find the factorial of a number without using recursion, the ‘while’ loop can be used. Example Below is a demonstration for the same − Live Demo my_num = int(input("Enter a number :")) my_factorial = 1 while(my_num>0): my_factorial = my_factorial*my_num my_num=my_num-1 print("The factorial of the number is : ")

Here, the number whose factorial is to be found is stored in num, and we check if the number is negative, zero or positive using if...elif...else statement. If the number is positive, we use for loop and range () function to calculate the factorial.

Jun 5, 2023 · Program Steps: 1. Take a number from the user. 2. Initialize a factorial variable to 1. 3. Use a while loop to multiply the number to the factorial variable and then decrement the number. 4. Continue this till the value of the number is greater than 0. 5. Print the factorial of the number. 6. Exit. Program Coding:

Sep 12, 2022 · In Python, you can calculate the factorial using a while loop. Here are some key applications of factorials, along with an example code snippet for calculating factorials using a while loop.