Types in .net

in this presentation includes data types of .net like int, float etc.

1. Types in .NET By Komal Jain

2. Common Type System The common type system defines how types are declared, used, and managed in the common language runtime, and is also an important part of the runtime's support for cross-language integration . The common type system performs the following functions Establishes a framework that helps enable cross-language integration, type safety, and high-performance code execution . Provides a library that contains the primitive data types (such as  Boolean ,  Byte ,  Char ,  Int32 , and  UInt64 ) used in application development.

3. Value types and Reference types C# divides the world of types into value types and reference types. Value types are created on the stack. All the intrinsic types ( int ,long) are value types and thus are created on the stack. Objects on the other hand, are reference types. Reference types are created on an undifferentiated block of memory known as the heap. Structs , types such as int , float, long etc are value types. Strings are reference types. Memory of reference types is claimed by garbage collector.

4. Value Types Value type variables can be assigned a value directly. They are derived from the class  System.ValueType . The value types directly contain data. Some examples are  int, char, and float , which stores numbers, alphabets, and floating point numbers, respectively. When you declare an  int  type, the system allocates memory to store the value.

5. C# Memory Range int 4 bytes –2147483648 to 2147483647 long 8 bytes –9223372036854775808 to 9223372036854775807 byte 1 byte 0 to 255 float 4 bytes –1.5x10-45 to 3.4 x x1038 double 8 bytes –5.0x10-324 to 1.7x10308 char 2 bytes Unicode characters boolean 1 byte True or false Predefined Data Types

6. Reference Types The Reference type variable is such type of variable in C# that holds the reference of memory address instead of value. 

7. For example, consider following string variable: string s = "Hello World!!"; The following image shows how the system allocates the memory for the above string variable. Memory allocation for Reference typeAs you can see in the above image, the system selects a random location in memory (0x803200) for the variable 's'. The value of a variable s is 0x600000 which is the memory address of the actual data value. Thus, reference type stores the address of the location where the actual value is stored instead of value itself.

8. References http://www. tutorialspoint.com http://www.tutorialsteacher.com https://www.youtube.com/watch?v=NbucRONDb78 Thank You