2017-02-17c# Basics-Define variables, input and output

C # read as Sharp

. CS is the file suffix name of the source code that is written in the C # language.

Console application creation steps: Open vs, click File, select "New"-"Project", select Template Visual C #, framework. NET Framework, Application console control program. Select a location to save and name the file.

Writing code in the main function

Console WriteLine ("content to output"); Used to output content

Console ReadLine (); Wait for user input, press ENTER to end, prevent program Flash.

usingSystem.Text;namespacePractice 1{classProgram {Static voidMain (string[] args) {             //Input ContentConsole.WriteLine ("please click on the xx button in the upper right corner");            Console.ReadLine (); Console.WriteLine ("Why don't you point it out?"); Console.WriteLine ("Good , obedient.");            Console.ReadLine (); Console.WriteLine ("I'll turn it off by myself .");            Console.ReadLine (); Console.WriteLine ("well, bye ."); //to prevent flash back, press ENTER to end. Console.ReadLine (); }    }}

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Variable
Content printing:

Console.writelline ("content"); Console.writel ("content");//No line will be automatically wrapped

Variable printing:

Console.writelline (variable name); Console.writel (variable name);

To receive user input:

Console.ReadLine (); -Returns a string (string) type of value

String strings

Defines a variable string A;

Variable assignment value a= "value";

Combine string a= "value", and two string type "+" to stitch the two strings.

int integer type variable.

Define the shaping variable int A;

Shaping variable assignment a=1;

The shaping variable can be "+-*/" and the result is the result of a mathematical operation.

How do I convert a string type to an integer type?

String a= "10";

int B=int.parse (a);

A variable cannot have a duplicate name, regardless of the type of variable.

Variables must first be defined and reused.

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingSystem.Text;5 6 namespace_0217 Job7 {8     class Program9     {Ten         Static voidMain (string[] args) One         { A            //user Input -Console.Write ("Please enter your name:"); -             stringA =console.readline (); the              -Console.Write ("Please enter your gender:"); -             stringb =console.readline (); -              +Console.Write ("Please enter your age:"); -             stringc =console.readline (); +              AConsole.Write ("Please enter your height:"); at             stringD =console.readline (); -             intf =int. Parse (d); -  -Console.Write ("Please enter your weight:"); -             stringE =console.readline (); -             intg =int. Parse (e); in  -Console.WriteLine ("---------------------Gorgeous split-line---------------------"); to             +Console.Write (A +"Hi there! "); -Console.Write ("your gender is ""+b); theConsole.Write ("", your age is""+c); *Console.Write (", your height is ""+d); $Console.Write (""and your weight is""+e);Panax NotoginsengConsole.WriteLine ("". "); -  the             inth = f +G; +           AConsole.Write ("your height and weight and is ""+h); theConsole.WriteLine ("". ");             //prevent flash back - console.readline (); Wu         } -     } About}

2017-02-17c# Basics-Define variables, input and output