팩토리얼 (while, do while 문)

1. while 문

public class chp4_5_1_while {
	public static void main(String[] args) throws java.io.IOException{
		int s=1, i=1;
		int n = System.in.read() - '0';
		
		while(i<=n) {
			s = s * i;
			++i;
		}
		System.out.println(s);
	}
}

2. do while 문

public class chp4_5_1_do_while {
	public static void main(String[] args) throws java.io.IOException{
		int s=1, i=1;
		int n = System.in.read() - '0';
		
		do {
			s = s * i;
			++i;
		} while(i<=n);
		System.out.println(s);
	}
}