The factorial of a natural number n is the product of the positive integers less than or equal to n. The factorial calculator allows you to find this number.

The **online factorial calculator** has the **factorial** function
which allows to **calculate online factorial** of an integer.

The exclamation point is generally used as a notation of the factorial, the calculator allows to use this notation.

For example, for **calculating the factorial of 5** , use the following syntax
factorial(`5`),
after calculation , the result 120 is returned.
The following syntax can also be used to calculate the factorial 5!

For small numbers, the calculator is able to give the details of the calculations of factorial.

factorial(n), where n is a integer.

It is possible to use the exclamation point to calculate the factorial, n!

factorial(`5`), returns 120

See also

- Number of arrangement of a set calculator : arrangement. To calculate online the number of arrangement of p elements of a set of n elements.
- Calculation of binomial coefficients : binomial_coefficient. A binomial coefficient calculator that allows you to calculate a binomial coefficient from two integers.
- To count the number of combinations : combination. To calculate the number of k elements of part of a set of n elements.
- Base-n converter : base_converter. The calculator allows you to make decimal, binary, hexadecimal conversions, and more generally to any base n between 2 and 36.
- Prime factorization calculator : prime_factorization. The function prime_factorization is used to calculate online the decomposition of an integer into prime factors.
- Quotient and remainder calculator : euclidean_division. The calculator allows to find online the quotient and the remainder in the euclidean division of two polynomials or two integers.
- Parity of a number : is_odd. Is_odd function returns true if the number passed is odd, false otherwise.
- Parity of a number : is_even. Is_even function returns 1 if the number is even, 0 otherwise.
- Factorial calculator : factorial. The factorial of a natural number n is the product of the positive integers less than or equal to n. The factorial calculator allows you to find this number.
- Integer calculations : integer_functions. This calculator allows you to apply special functions to an integer: prime_factorization, base_converter, factorial, percentage, permutation, perimeter, is_even, is_odd.
- Permutation calculator : permutation. To calculate online the number of permutation of a set of n elements.
- Gcd calculation online : gcd. GCD calculator that uses Euclid's algorithm to give the steps of the GCD calculation.
- Least common multiple : lcm. LCM calculator to calculate the least common multiple (LCM).
- Pythagorean theorem calculator : pythagorean. The calculator uses the Pythagorean theorem to verify that a triangle is right-angled or to find the length of one side of a right-angled triangle.
- Countdown solver : arithmetic_solver. This countdown solver allows finding a target number from a set of integer in using arithmetic operations.