一變量 賦值

var a = 100;

var b = 200;

var sum = 0;

sum = a + b ;

console. writeline(sum);

console.readline();

字符類型

char 單個字符

string 字符串

bool 正負(fù)

double decimal int 數(shù)字

\n 切行

重新賦值

int a = 20;

int b = 30;

int temp = 0; 定義temp

temp = n1;

n1 = n2;

轉(zhuǎn)換類型

console.writeline('plz enter a num");

string str = console. readline();

string num = str + 20.tostring();

console.writeline(num);

console.readlien();

二輸入

1信息收集

console.writeline("plz enter your name");

string name = console.readline();

name為string格式

console.writeline('plz enter your habit");

string habit = console.readlne();

//組織格式

string info = "your name is:";

string newinfo = info + name;

console.writeline(newinfo); 復(fù)雜

coonsole.writeline("your name is;" + name);簡便

三if條件

bool變量只存在 true or false；

bool tag = true;

if (tge);

{

console.writeline(" there is inner of if");

console.writeline("ya only see me when bol is true");

}

console.readline();

等于if

bool checked = name == "mike"; //兩個等于是如果等于

??????Console.WriteLine("plz enter ya name");

??????string name = Console.ReadLine();

??????

??????bool ischeck = name == "Mike";

??????if (ischeck)

??????{

????????Console.WriteLine("your entered Mike");

????????name = "bandit mike";

??????}

??????Console.WriteLine("your name is" + name);

??????Console.ReadLine();

不等于if