Factorial Calculator

What is a Factorial?

In mathematics, a factorial is a function that represents the product of all positive integers from 1 to a given non-negative integer. It is typically denoted by an exclamation mark (!) after a number.

The Factorial formula:

n! = 1×2×3×4×...×n

How to calculate Factorial?

To calculate the factorial manually, you need to follow these steps:

  1. Choose the number for which you want to calculate the factorial; let's call it n.
  2. Start from 1 and create a list of numbers from 1 to n.
  3. Based on this list of numbers, perform consecutive multiplications from 1 to n. This means you start with 1 and multiply it by 2, then continue multiplying by 3, 4, and so on until you multiply by n. Repeat this process.
  4. Once you have multiplied all the numbers from 1 to n, the result of this multiplication is the factorial of n.
  5. Record this result or use it for your intended purpose.


For example, to calculate 5!, you would do the following:

5! = 1×2×3×4×5 = 120

So, 5! = 120.

If you want to calculate the factorial of a different number, simply replace n with that number in the calculation.

See also
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