Factorial of a Number
Write a program to find the factorial of a number.

Factorial of n is:

n! = n * (n-1) * (n-2) * (n-3)....* 1

Output the factorial of 'n'. If it does not exist, output 'Error'.

Input format :

The only line of input contains a single integer.

Output format :

The only line of output prints the Factorial of the number or "Error" if it doesn't exist.

Constraints:

-10

Question

Factorial of a Number

The only line of input contains a single integer.

The only line of output prints the Factorial of the number or "Error" if it doesn't exist.

-10 <= n <= 12

Accepted Answer

Using while() loop

This can be done using an if-else-if ladder to check for negative,0, and positive numbers.
If the input is a positive number use a while loop to multiply n with n-1, n-2…1 and get the desired output.

Space Complexity: O(1)Explanation: Time Complexity: O(1)Explanation:

Accepted Answer

Using for() loop

This can be done using an if-else conditional statement to check for negative, and positive numbers.
If the input is a positive number use a for loop to multiply n with n-1, n-2…1 and get the desired output.

Space Complexity: O(1)Explanation: Time Complexity: O(1)Explanation:

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