In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5!=5 * 4 * 3 * 2 * 1 = 120 Write a programn (in Java) to print and calculate the factorial for a given (n) number

I'll show a few implementations, starting with the easiest to understand.

1.) While loop.

public static void main (String[] args) {

System. out. print (factorial (n));

}

public static int factorial (String n) {

int result = 1;

while (n > 0) {

result * = n;

n--;

}

return result;

}

2.) For loop (I'll just show the contents of the factorial (String) method):

int result = 1;

for (int i = n; i > 0; i--) {

result * = i;

}

return result;

3.) Recursively.

public static int factorial (int n) {

if (n = = 1) return n;

return n * factorial (n-1);

}