Write a Non tail recursion and a tail recursion method in Java with a test class that does the following: The factorial of a positive integer n —which we denote as n!—is the product of n and the factorial of n 1. The factorial of 0 is 1. Write two different recursive methods in Java that each return the factorial of n. Please and Thank you
Write a Non tail recursion and a tail recursion method in Java with a test class that does the following:
The factorial of a positive integer n —which we denote as n!—is the product of n and the factorial of n 1. The factorial of 0 is 1. Write two different recursive methods in Java that each return the factorial of n.
Please and Thank you
Certainly! Here are two different recursive methods in Java to calculate the factorial of a positive integer n, one using non-tail recursion and the other using tail recursion. I'll also provide a test class to demonstrate their usage:
- Non-Tail Recursion Method:
public class FactorialCalculator {
// Non-tail recursion method
public static long calculateFactorial(int n) {
if (n == 0) {
return 1; // Base case: 0! = 1
} else {
return n * calculateFactorial(n - 1); // Recursive case
}
}
}
public class FactorialTest {
public static void main(String[] args) {
int n = 5; // Example: Calculate 5!
long result = FactorialCalculator.calculateFactorial(n);
System.out.println(n + "! = " + result); // Output: 5! = 120
}
}
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