Top 100 Python Interview Questions | Python Programming | Factorial of Number in Python.

In this video, I have explained a program to find factorial of a given number. Factorial of a given number is multiplication of all the number from the number to 1. For Example factorial of 5 will be 5*4*3*2*1 = 120. Factorial program is one of the best program to understand the looping concept and is usually asked in the examinations.

We will do Factorial program using While statement. While statement is used to execute a single statement or a block of statement n times till the condition is true. Every loop must contain three parts:

1. Initialization of counter variable.
2. Condition
3. Increment/Decrement of counter variable

While loop or any loop will work fine if all the three parts are there in the programs. If any one is missing the loop will not run properly.

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