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. …

Here you will get Python program to find factorial of number using for and while loop. The Factorial of a number is calculated by multiplying it with all the numbers below it starting from 1. For example, the factorial of 4 is 24 (1 x 2 x 3 x 4).

I can make it in an if / elif else statement: num = ... print("must be positive") print("factorial = 1") for i in range(1,num + 1): factorial = factorial*i. print(num, factorial) But I want to do this with a while loop (no function). A for loop can be rewritten as a 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.

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.

Sep 12, 2022 · Let us look at the Python program to find the factorial of a number using While Loop. Python Program to Print the Factorial of a Number Using While Loop # accept input number from user n = int(input("Enter any number: ")) # logic to calculate the factorial of a number f = 1 while n >= 1: f *= n n -= 1 # print output print("Factorial is", f)

Dec 27, 2022 · Python Program to find Factorial of a Number is used to calculate the factorial of a given number using While loop and prints the value in the output screen.

Mar 20, 2025 · This Python tutorial explains, how to print factorial of a number in Python, Python program to print factorial of a number using function, Python program to find factorial of a number using while loop, etc.

Here is code to find the factorial of a given number using a while loop in Python: Simple code: num = int(input("Enter a number: ")) fact = 1 while num > 0: fact *= num num -= 1 print("Factorial =", fact)

Python Program to Find Factorial of a Number. In this article, I've created some programs in Python, that find and prints factorial of a given number by user at run-time. Here are the list of approaches used: Find Factorial of a Number using while Loop; Using for Loop; Using user-defined Function; Using Recursion; Using Class