各句什么意思 C#

using System;
using System.Collections.Generic;
using System.Text;

namespace 实验报告2_2题
{
class ArthTest
{
public static void Main(string[] args)
{
int n = 10, m = 3; // 1
float f = 5.0F, g = 10.0F; //2
double d = 5.0, e = 10.0; //3
Console.WriteLine("n+m={0},n-m={1},n*m={2},n/m={3},n%m={4}",n+m,n-m,n*m,n/m,n%m); //4
Console.WriteLine("d+e={0},d-e={1},d*e={2}d/e={3}",d+e,d-e,d*e,d/e); //5
Console.WriteLine("n+m-f*g/d={0}", n + m - f * g / d); //6
Console.WriteLine("n%m*f*d={0}", n % m * f * d); //7
Console.ReadLine( );
}
}
}

1234567各句都是什么意思 另外

声明变量并且赋值
用布尔型变量Result和Double型变量Total存放结果运行并且观察实验结果
编写一段代码a=3,b=4,c="hello",d="bye"