The exact factorial of 2 is:
📌 Number of digits in the exact factorial of 2! = 1.
Approximately, the value of 2! can also be written as 2.
How to calculate 2!
The formula for finding the factorial of a number is:
n! = n × (n-1) × (n-2) × … × 2 × 1
The same formula can also be written in terms of PI product notation as:
So, by definition, 2! is calculated as:
2 × 1
Frequently asked questions
Here are some frequently asked questions about factorial of 2:
How many digits are there in the exact value of 2!?
There are 1 digits in the exact value of 2!.
What is the value of 2 factorial in terms of E?
The value of 2! in terms of E is 2.
What are the uses of factorials?
According to Wikipedia:
In mathematical analysis, factorials are used in power series for the exponential function and other functions, and they also have applications in algebra, number theory, probability theory, and computer science.