Problem Link - Small Factorial Practice Problem in 500 to 1000 difficulty problems
Problem Statement:
Write a program to find the factorial value of any number entered by the user.
Approach:
Since N can range from 0 to 20, we need a straightforward way to compute the factorial for each N in a single test case. Here’s how we can approach the problem:
- Iterative Computation:
- Use a loop to compute the factorial iteratively. Initialize the result as 1 and multiply it by each integer from 1 to N.
- Handling Special Cases:
- 0! is defined as 1. This needs to be considered as a special case to avoid errors in computation.
Complexity:
- Time Complexity:
O(N)
for each computation ofN!
. - Space Complexity:
O(1)
No additional space other than variables used for computation.