Functions and variables

Static and Dynamic

Hml static (Data static)

ASP/ASP. NET Dynamic (Data Dynamics)

 

C # programming:

(1) Project Structure

. Cs -- source file (program code)

. Csproj -- project file (Manage File items)

. Sln -- solution file (manage projects)

. Config -- configuration file

 

Four elements of a function: name, input, output, and processing

 

Main Function

Static void main (string [] ARGs)

{

}

 

Input statement

String S = console. Readline ();

 

Output statement

Consystemic writeline ("content to be output ")

Consystemic wrie ("content to be output ")

Difference between writeline and write: automatic line feed after writeline output

 

(2) Data Types

1. Integer: byte, Int, short, long

2. Float Type: float, double, decimal

3. Character Type: Char (single character, with single quotation marks '')

4. boolean: bool (true, false)

5. string type: string (double quotation marks "")

6. datetime type

 

(3) variables

1. variable naming rules:

1) variable names: letters, numbers, underscores, @, and Chinese characters.

2) the first character can only be letters, underscores, @, and Chinese characters.

3) The name cannot be the same as the system keyword.

2. variable definition:

Data type variable name [= value]

Example: int A = 1

3. Use of variables:

Value assignment, Value

 

(4) Constants

1. Classification: symbolic constants and literal Constants

2. Definition of symbolic Constants

Add the keyword const before variable Declaration

Example: const int A = 3

3. Use of symbolic constants: values cannot be assigned. Values can only be set.

4. escape characters:

'\ T' Tab key character

'\' Backslash

'\ ''Single quotes

'\' Double quotation marks

'\ N' line feed

'\ R' press ENTER

 

Appendix:

; Statement ended

// Comment a row

/* Comment out a region */

Shift + delete a row

CTRL + (K, c) comment the selected row

CTRL + (K, u) uncomment the selected row

Alt + → prompt, change