C#入门经典:第三章 变量和表达式

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1.C#编译器不考虑代码中间的空格、回车符或tab字符（这些字符统称为空白字符）。

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

namespace Chapter03
{
    class Program
    {
        static void Main(string[] args)
        {
            int myInterger;
            string myString;
            myInterger = 17;
            myString = ""myInteger" is";
            Console.WriteLine("{0} {1}.", myString, myInterger);
            Console.ReadKey();
        }
    }
}

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    <a id="ematt:543" href="http://www.whatled.com/content/uploadfile/201309/10fb1380031228.png" target="_blank"><img title="点击查看原图" border="0" alt="3.png" src="http://www.whatled.com/content/uploadfile/201309/10fb1380031228.png" width="669" height="84" /></a> 
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Chapter03
{
    class Program
    {
        static void Main(string[] args)
        {
            double firstNumber, secondNumber;
            string userName;
            Console.WriteLine("Enter your name:");
            userName = Console.ReadLine();
            Console.WriteLine("Welcome {0}!", userName);
            Console.WriteLine("Now give me a number:");
            firstNumber = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Now give me another number:");
            secondNumber = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("The sum of {0} and {1} is {2}.", firstNumber, secondNumber, firstNumber+secondNumber);
            Console.WriteLine("The result of subtracting {0} and {1} is {2}.", firstNumber, secondNumber, firstNumber - secondNumber);
            Console.WriteLine("The product of {0} and {1} is {2}.", firstNumber, secondNumber, firstNumber * secondNumber);
            Console.WriteLine("The result of dividing {0} by {1} is {2}",firstNumber, secondNumber, firstNumber / secondNumber);
            Console.WriteLine("The remainder after dividing {0} by {1} is {2}", firstNumber , secondNumber , firstNumber % secondNumber);
            Console.ReadKey();
        }
    }
}

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