C# 1-10 阶乘

1-10 阶乘

1. 代码

• for 循环

public int FunFactorial(int lenth){
    int sum=1;
    for (int i = 1; i <= lenth; i++){
        sum *= i;
    }
    return sum;
}
Console.WriteLine(FunFactorial(10)); //  3628800

• 递归实现

public int FunFactorial(int sum)
{
    if (sum >1)
    {
        return  FunFactorial(--sum) * sum;
    }
    else
    {
        return sum;
    }
}
Console.WriteLine(FunFactorial(11)); // 3628800