The factorial of a positive integer is 1 multiplied by 2 multiplied by 3 multiplied by 4 until you get the required number.

For example, if the required number is 4, then the factorial formula is 1×2×3×4, and the product is 24, which is the factorial of 4. For example, if the required number is 6, then the factorial formula is 1×2×3×…×6, and the product is 720, which is the factorial of 6. For example, if the required number is n, then the factorial formula is 1×2×3×…×n, and the product is x, which is the factorial of n.

The factorial representation of any natural number n greater than 1 is:

n!=1×2×3×……×n or n!=n×(n-1)!