求一个数的阶乘

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package factorial;

/** * @function:计算数的阶乘 *  * @author: Administrator */public class FactorialTest {

       //factorial方法,计算阶乘    public double factorial(int n){

        double sum = 1;

        for(int i = 1; i

        double result;

        FactorialTest f = new FactorialTest(); //声明 FactorialTest对象

        result = f.factorial(5);  //调用factorial函数,计算n的阶乘,赋值给result

        System.out.println("n! =" + result );   //打印    }}     //End