integer number factorial takes 1 times 2 times 3 times 4 all the way up to the desired number.

Example requires the number to be 4, then factorial is 1×2×3×4, the receive product is 24, and 24 is 4's factorial. If the number for Example is 6, the factorial is 1×2×3×... Times 6, the receive product is 720,720 is 6's factorial. If the number for Example is n, the factorial is 1×2×3×... x n, let the receive product be x, x is nfactorial.

any greater than 1 Nature Number n factorial method:

n!=1×2×3×……×n or n!=n×(n-1)!