布林

bool isAmyGirl = true;
bool isAndyGirl = false;

Console.WriteLine("Is Amy a Girl? {0}", isAmyGirl);
Console.WriteLine("Is Andy a Girl? {0}", isAndyGirl);
Console.ReadLine();
					

數字

int deposit = -200;
int score = 100;
uint age = 24;
long pixel = 1239847199868777238;
short studentCount = 155;

float height = 155.4F;
double bill = 699.14389713214938513;
decimal cash = 13.138471983741983477466371738123M;
					

文字

char grade = 'F';
string name = "Kei";

Console.WriteLine("Student Name: {0}.", name);
Console.WriteLine("Grade: {0}", grade);
Console.ReadLine();
					

其他

寫Main{}的下面

enum grade
{
	Outstanding,
	ExceedsExpectations,
	Acceptable,
	Poor,
	Dreadful,
	Terrible
};
					

其他

grade myGrade = Program.grade.Acceptable;
grade kerwinGrade = Program.grade.Outstanding;
grade ryanGrade = Program.grade.Terrible;

Console.WriteLine("Mine: {0}", myGrade);
Console.WriteLine("Kerwin's: {0}", kerwinGrade);
Console.WriteLine("Ryan's: {0}", ryanGrade);
Console.ReadLine();
					

不會改變的常數

出現錯誤訊息！

const int AGE = 28;
AGE = 40;
					

讀取資料

可是這樣會出錯!

string gender;
string name;
int age;

Console.Write("請輸入你的性別(M/F): ");
gender = Console.ReadLine();

Console.Write("請輸入你的姓名: ");
name = Console.ReadLine();

Console.Write("請輸入你的年齡：");
age = Console.Read();

Console.WriteLine("姓名：{0}", name);
Console.WriteLine("性別：{0}", gender);
Console.WriteLine("年齡：{0}", age);

Console.ReadLine();
					

Parse

string ageString;
int age;

Console.Write("請輸入你的年齡：");
ageString = Console.ReadLine();

age = int.Parse(ageString);
Console.WriteLine("年齡：{0}", age);

Console.ReadLine();
					

TryParse

string ageString;
int age;

Console.Write("請輸入你的年齡：");
ageString = Console.Read();

int.TryParse(ageString, out age);
Console.WriteLine("年齡：{0}", age);

Console.ReadLine();
					

四則運算

int cake = 3;

Console.WriteLine("我做了{0}個蛋糕", cake);
Console.WriteLine("每個蛋糕切八片後得到{0}片", cake*8);
Console.WriteLine("但是運送過程中晃壞了3片剩下{0}片", cake*8-3);
Console.WriteLine("剩的蛋糕分給5個人，每個人拿到{0}片，剩下{1}片", (cake*8-3)/5, (cake*8-3)%5);
Console.ReadLine();
					

偷懶的四則運算

int cake = 3;
cake = cake*8;
cake = cake-3;

int eachPerson = cake/5;
int left = cake%5;
					

偷懶的四則運算

int cake = 3;
cake *= 8;
cake -= 3;

int eachPerson = cake/5;
int left = cake%5;
					

串接文字

strin name = "Kei";
int age = 24;
float height = 155.4F;
float weight = flaot.MaxValue;

string intro = string.Format("大家好，\n我是{0}，\n今年歲{1}，\n身高{2}，\n體重{3}，\n請多多指教！",
							  name,
							  age,
							  height,
							  weight);
Console.Write(intro);
Console.ReadLine();
					

設計顯示的格式

strin name = "Kei";
int age = 24;
float height = 155.4F;
float weight = flaot.MaxValue;

string intro = string.Format("大家好，\n我是{0}，\n今年歲{1}，\n身高{2:F2}，\n體重{3:F4}，\n請多多指教！",
							  name,
							  age,
							  height,
							  weight);
Console.Write(intro);
Console.ReadLine();