Visual studio-c#-20160411

The four elements of a function include: name, input, output, processing

Comment by://comment only one line;/**/note a region;

namespace ConsoleApplication6---------//namespace
{

Class program---------------------------//Classes
{
static void Main (string[] args)-----------//method, no semicolon required behind
{
Console.WriteLine ("");--------------------//Output statement, wrap line

Console.Write ("");------------------------//Output statement, do not wrap

String a = Console.ReadLine ();-----------//Input statement

/* Adder */

Console.WriteLine ("Please enter a number:");
String a = Console.ReadLine ();
Console.WriteLine ("Please enter another number:");
String B = Console.ReadLine ();
Console.WriteLine (A + "+" +b+ "=" + (int). Parse (a) +int. Parse (b)));

}

}

}

Data type:

First, the basic type

Integer int can only put a finite number of digits

Short

Long

Floating-point double the default decimal number is double

Float if the decimal is to be treated as float, you need to add the f,f suffix in the back

Character Char with single quote, only one character, except for escape characters

boolean bool can only be placed in True,false code only lowercase, and do not quote

Ii. type of reference

String double quotation mark, consisting of one or more characters

Type conversions:

1, automatic conversion as long as there is no data loss situation, will automatically convert

2. Forced conversion

For numbers to be converted it is worthwhile to add parentheses to the left, and the parentheses to write the type to be turned into.

For the string to be converted to the corresponding value: use parse; int A=int. Parse ("string");

Use convert; Double d= convert.todouble (s);

Escape characters:

\ "double quotation mark \ \ backslash \ n line break \ r enter \ t horizontal tab

Visual studio-c#-20160411