Java 实例 使用For和While循环查找阶乘

public class JavaExample {

    public static void main(String[] args) {

        //We will find the factorial of this number
        int number = 5;
        long fact = 1;
        for(int i = 1; i <= number; i++)
        {
            fact = fact * i;
        }
        System.out.println("Factorial of "+number+" is: "+fact);
    }
}

Factorial of 5 is: 120

public class JavaExample {

    public static void main(String[] args) {

        //We will find the factorial of this number
        int number = 5;
        long fact = 1;
        int i = 1;
        while(i<=number)
        {
            fact = fact * i;
            i++;
        }
        System.out.println("Factorial of "+number+" is: "+fact);
    }
}

Factorial of 5 is: 120

import java.util.Scanner;
public class JavaExample {

    public static void main(String[] args) {

        //We will find the factorial of this number
        int number;
        System.out.println("Enter the number: ");
        Scanner scanner = new Scanner(System.in);
        number = scanner.nextInt();
        scanner.close();
        long fact = 1;
        int i = 1;
        while(i<=number)
        {
            fact = fact * i;
            i++;
        }
        System.out.println("Factorial of "+number+" is: "+fact);
    }
}

Enter the number: 
6
Factorial of 6 is: 720