2014-12-08 C # Basics

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

Name space
namespace firstdebug
{
//Class
class Program
{
//main function, an entire project, with only one main function, which is the entry of the program
static void Main (string[] args)
{
//Start writing code

//data type variable name = value;

int i=0;

//Can be written separately

int s;

S=1;

//define multiple

int a,b,c;

b=3;

//

Double d=1.23 D;---end plus d for double type

float f=1.23f;

Decimal m=1.23m;

    //

BOOL Bo=true;

//

String s1= "Hello";

Console. WriteLine (i);
Console. ReadLine ();
}
}
}

Color of the class: dark blue

Constants: const+ a data type

For example, const double d=1.23 (x)

Constants are not assigned, they can only be referenced

Type conversions:

int i=4;

int s=5;

Double jieguo= (double) i/s; (the parentheses are converted to casts directly before the variable, only double,int,decimal)

String ss=i.tostring (); (Convert I to String type)

String s1= "3.5";

Double dd=double.      Parse (S1); Convert S1 to double type

Or: Double ds=convert.todouble (S1);

2014-12-08 C # Basics