Factorial of a given number
Factorial of a number is the product of all positive descending integers. Factorial of n is denoted by n!.
For example,
3! = 3 * 2 * 1 = 6
4! = 4 * 3 * 2 * 1 = 24
5! = 5 * 4 * 3 * 2 * 1 = 120
Here you have to get the number from command line argument. The logic to find the factorial of a number is given below.
PROGRAM
class Factorial {
public static void main(String[] args) {
int fact=1,no;
no = Integer.parseInt(args[0]);
System.out.print("Factorial of "+no+" is ");
while(no > 0) {
fact = fact * no;
no--;
}
System.out.println(fact);
}
}
OUTPUT
C:\>javac Factorial.java C:\>java Factorial 4 Factorial of 4 is 24