In mathematics, the factorial of a non-negative integer n is the product of all positive integers less than or equal to n. It is denoted by n! and it is used often in math computations, particularly in algebra and calculus.
In Python, the factorial can be calculated using the math library, specifically the factorial function. In this tutorial, we will show you how to denote a factorial in Python.
Step 1: Importing math library
Python comes with a built-in library named math that provides a set of mathematical functions. One of these functions is factorial(). Before we can use this function, we first have to import the math library.
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import math |
Step 2: Using the factorial() function
The factorial operation in Python can be performed with the factorial() function in the math module. The factorial() function takes a single argument (a non-negative integer) and returns the factorial of the specified number.
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print(math.factorial(5)) |
Running the above lines of code will return:
120
The number 5 factorial (5!) is calculated as 5*4*3*2*1 = 120.
Please find the complete code below:
Complete Code
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import math print(math.factorial(5)) |
The output will be:
120
Conclusion
From our tutorial, it’s evident that calculating the factorial of a number is a straightforward process in Python.
This functionality can be incredibly useful in different cases, especially when dealing with combinatorics or probability in data analysis tasks.
Remember always to make good use of the inbuilt Python libraries like math, as they are there to make your coding journey much easier.