3.1.1 Integer type

I. Integer type

C # defines the integer type in 8: byte, unsigned byte, short, and ushort) INTEGER (INT), none
Symbol INTEGER (uint), long integer (long), and unsigned long integer (ulong ). The division is based on the number of digits this type of variable occupies in the memory.

In C #, each integer type corresponds to a structure defined in the. NET class library.ProgramSet in system. The above structure provides two basic attributes: minvalue and maxvalue, respectively, representing the minimum and maximum values of the type.

Data Type	Description	Value Range	Corresponds to the structure in the system assembly
Sbyte	Signed 8-digit integer	-128 ~ 127	Sbyte
Byte	Unsigned 8-digit integer	0 ~ 255	Byte
Short	Signed 16-digit integer	-32768 ~ 32767	Int16
Ushort	Unsigned 16-digit integer	0 ~ 65535	Uint16
Int	Signed 32-bit integer	-2147483648-2147483647	Int32
Uint	Unsigned 32-bit integer	0 ~ 4294967295	Uint32
Long	Signed 64-bit integer	-9223372036854775808 ~ 9223372036854775807	Int64
Ulong	Unsigned 64-bit integer	0 ~ 18446744073709551615	Uint64

Integer value rangeCode:

 Using  System;
  Using  System. Collections. Generic;
  Using  System. LINQ;
  Using  System. text;

  Namespace Integerrange
{
  Class  Program
{
  Static     Void  Main (  String  [] ARGs)
{
Console. writeline (  "  Value range of Integer type:  "  );
  //  Sbyte  
 Console. Write (  "  Sbyte: \ t  "  );
Console. Write (sbyte. minvalue );
Console. Write (  "  ~  "  );
Console. writeline (sbyte. maxvalue );

  //  Byte  
  Console. Write (  "  Byte: \ t "  );
Console. Write (byte. minvalue );
Console. Write (  "  ~  "  );
Console. writeline (byte. maxvalue );

  //  Short  
  Console. Write (  "  Int16: \ t  "  );
Console. Write (int16.minvalue );
Console. Write ( "  ~  "  );
Console. writeline (int16.maxvalue );

  //  Ushort  
  Console. Write (  "  Uint16: \ t  "  );
Console. Write (uint16.minvalue );
Console. Write (  "  ~  " );
Console. writeline (uint16.maxvalue );

  //  Int  
  Console. Write (  "  Int32: \ t  "  );
Console. Write (int32.minvalue );
Console. Write (  "  ~  "  );
Console. writeline (int32.maxvalue );

  // Uint  
  Console. Write (  "  Uint32: \ t  "  );
Console. Write (uint32.minvalue );
Console. Write (  "  ~  "  );
Console. writeline (uint32.maxvalue );

  //  Long  
  Console. Write ( "  Int64: \ t  "  );
Console. Write (int64.minvalue );
Console. Write (  "  ~  "  );
Console. writeline (int64.maxvalue );

  //  Ulong  
  Console. Write (  "  Uint64: \ t  " );
Console. Write (uint64.minvalue );
Console. Write (  "  ~  "  );
Console. writeline (uint64.maxvalue );

Console. writeline ();
}
}
} 

Execution result:

 Value range of Integer type:
Sbyte:  -  128  ~  127  
Byte:  0  ~  255 
Int16:  -  32768  ~  32767  
Uint16:  0  ~  65535  
Int32:  -  2147483648  ~  2147483647  
Uint32:  0  ~ 4294967295  
Int64:  -  9223372036854775808  ~  9223372036854775807  
Uint64:  0  ~  18446744073709551615  

Press any key to continue... 

If the type value exceeds the value range, the program will overflow during running.

Byte overflow code:

 Using  System;
  Using System. Collections. Generic;
  Using  System. LINQ;
  Using  System. text;

  Namespace  Integrateoverflow
{
  Class  Program
{
  Static     Void  Main (  String  [] ARGs)
{
 Byte  B  =     100  ;
B  =  (  Byte  ) (B  +     200  );  //  Overflow  
 
Console. writeline (B );
}
}
} 

Execution result:

 
44
Press any key to continue...
 

II,Source code

Integerrange.rar

Integrateoverflow.rar