Factorial Calculator
'Factorial Calculator' is an online tool that helps to calculate the factorial of a given number.
What is Factorial Calculator?
Online Factorial Calculator helps you to calculate the factorial of a given number within a few seconds.
Factorial Calculator
NOTE: Please enter the values upto two digits only.
How to Use Factorial Calculator?
Please follow the below steps to find the factorial of a given number:
- Step1: Enter the number in the given input box.
- Step 2: Click on the "Calculate" button to find the factorial of a given number.
- Step 3: Click on the "Reset" button to clear the fields and find the factorial of a given number for different values.
How to Find Factorial?
A factorial of a number is defined as a function which multiplies the number by every natural number below it. Symbolically the factorial can be represented as "!"
So, n factorial is the product of first n natural numbers, represented as n!
Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1) or n! = n (n-1)!
Solved Examples on Factorial Calculator
Example 1:
Find the 5! and verify it using online factorial calculator.
Solution:
Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1)
= 5 (5 - 1) (5 - 2) (5 - 3) (5 - 4) (5 - 5)!
= 5 × 4 × 3 × 2 × 1 × 0! [0! = 1]
= 120
Example 2:
Find the 7! and verify it using online factorial calculator.
Solution:
Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1)
= 7 (7 - 1) (7 - 2) (7 - 3) (7 - 4) (7 - 5) (7 - 6) (7 - 7)!
= 7 × 6 × 5 × 4 × 3 × 2 × 1 × 0! [0! = 1]
= 5040
Example 3:
Find the 6! and verify it using online factorial calculator.
Solution:
Factorial n! = n (n-1) (n-2) …………………….(3)(2)(1)
= 6 (6 - 1) (6 - 2) (6 - 3) (6 - 4) (6 - 5) (6 - 5)!
= 6 × 5 × 4 × 3 × 2 × 1 × 0! [0! = 1]
= 720
Similarly, you can try the calculator to find the factorial of any number
a) 10!, b) 7!, c) 13!