C# Primitive Types and Variables

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This C# Primitive Types and Variables tutorial will acquaint you with a clear understanding of the fundamentals of C# Primitive Types and Variables. In this C# Tutorial for beginners, you will get better understanding on what are Datatype Literals and Variables. we will start to learn C# with an introduction to C# variable. After that, we will discuss the Types of variables in detail.Then we will talk about primitive types. Then we will wind up this session with a demo on C# Primitive Types and Variables.

Education

What are variables?
Types of variable
Primitive data types
Implementation

What are Variables?
Each datatype of a variable must match the data which is
being stored.
Each C# Variables have types that define their memory
size, value range, and set of operations.
A variable is nothing more than a unique identifier for a
storage area that our programs can access.
When we create a variable then the system blocks off a
chunk of memory equal to size of variable.

Primitive Type
Signed
Data Type Bit Representation Value Range
sbyte 2^8 -128 to 127
short 2^16 -32768 to 32767
int 2^32
-2,147,483,648 to
2,147,483,647
long 2^64
-9,223,372,036,854,775,808 to
9,223,372,036,854,775,807

Primitive Type
Unsigned
Data Type Bit Representation Value Range
byte 2^8 0 to 255
ushort 2^16 0 to 65536
uint 2^32 0 to 4,294,967,296
ulong 2^64
0 to
18,446,744,073,709,551,615

Primitive Type
Floating points
Data Type Approx. Value Range Digit Precision
Float -3.4 x 1038 to +3.4 x 1038 7
Double ±5.0 x 10-324 to ±1.7 x 10308 15-16
Decimal
(-7.9 x 1028 to +7.9 x 1028)/(100
to 1028)
28-29

Data types define the type of data that can be stored in variables. The main built-in data types in C are integer (int), floating point (float, double), character (char), and pointer. Each data type specifies the type of values that can be stored as well as the amount of memory used. Arrays allow storing multiple values of the same type contiguously in memory and can be one-dimensional or two-dimensional. The sizeof operator returns the size in bytes of any type or variable. Typecasting converts values from one data type to another.

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