Third, variable

using system;using system.collections.generic;using system.linq;using system.text; Namespace _3. Variable {    class program    {         static void main (String[] args)          {            //  integer Types              sbyte mySbyte = 45;             byte myByte =  (byte) mysbyte;             console.writeline ("mySbyte =  {0} ",  mysbyte);             Console.WriteLine ("Mybyte = {0}",  mybyte);                         int myInt = 486255;             console.writeline ("myint = {0}",  myInt);                          float myFloat = 3.14F;             console.writeline ("myfloat = {0}",  myfloat);                          bool myBool1 = true, myBool2;             myBool2 = false;             console.writeline ("mybool1 = {0}",  mybool1);           &nbSp; console.writeline ("mybool2 = {0}",  mybool2);                          Console.readkey ();        }    }}/** *  A , the basic concept of variables  *  (1)   variable is a name for the program to manipulate the store.  *  (2)   Each variable has a specific type, and the type determines the memory size and layout of the variable.  *  *  naming rules for variables  *  (1)   variable names by numbers, letters, underscores (_), and @.  *  (2)   cannot start with a number.  *  (3)   cannot use keywords as variable names.  *  *  syntax for declaring variables  * <data_type> <variable_list>; *   *  parameter Parsing: * <data_type>:  valid C # data types.  * <variable_list>:  one or more comma-delimited identifiers.  *  *  Initialization of variables  *  (1)   declaring variables before initializing  * <variable_name> =  <value>; *  *  parameter parsing: * <variable_name>:  variable name  * <value>:  value  *  *  (2)   Initialize when declaring a variable  * <data_type>  <variable_name> = <value>; *  *  parameter analysis: &NBSP;*&NBSP;&LT;DATA_TYPE&GT;:   Valid C # data types  * <variable_name>:  variable names  * <value>:  values  *   *  Note: Using uninitialized variables results in compilation errors.  *  *  Five, Lvalue, and rvalue  * <lvalue>: lvalue expressions can appear to the left and right of an assignment statement. An  * <rvalue>: rvalue expression can appear to the right of an assignment statement, but not to the right of an assignment statement. The  *  *  variable is <lvalue&gt, and the value is <rvalue>.  *  *  vi. Variable Command conventions  *  (1)  pascalcase naming conventions  * eg. *       int age; *      string lastname; *       double WinterOfDiscontent; *   *  (2)   CamelCase Naming Conventions  * eg. *      int age; *      string firstName; *      double  timeofdeath; */

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Third, variable