Factiorial with function

[nik96]

i need help to calculate the factorial with function

The program should then calculate the factorial of the
number n, where n!= n×(n −1)...× 2×1

the output like this:

Enter number: 4
Factorial of 4! = 24
Enter number: 6
Factorial of 6! = 720
Enter number: 3
Factorial of 3! = 6
Enter number: 0
Factorial of 0! = 1
Enter number: -5
Factorial of -5! = -1
Press any key to continue . ....

[tvrameshmc]

int factorial(int n)
{
	if(n<=0)
		return 1;
	else
		return n*factorial(n-1);
}

This is recursive function to calculate factorial of a number.

[nik96]

thank you so much for the answer..!!

[nik96]

and call two function the first asked the user to type a number use one for loop and second used

[int factorial(int n)
{
	if(n<=0)
		return 1;
	else
		return n*factorial(n-1);
}

this to calculate the factorial is correct?

[tvrameshmc]

 int input;
   cout << "\nEnter number to calculate factorial:";
   cin >> input;
   
   int fact=factorial(input);
   cout<<fact;

[vlad from moscow]

@tvrameshmc

int factorial(int n)
{
	if(n<=0)
		return 1;
	else
		return n*factorial(n-1);
}

The code does not correspond to the original assignment because for negative numbers the function shall return -1.

[nik96]

What is the full code?

[vlad from moscow]

@nik96
What is the full code?

It is your task to write the full code. One of possible realization was already demonstrated.