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c-sharp-variable
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C# Variable
A variable is the name of a memory location. It is used to store data. Its value can be changed and it can be reused many times.It is a way to represent memory location through symbol so that it can be easily identified.
Variable Type | Example |
---|---|
Decimal types | decimal |
Boolean types | True or false value, as assigned |
Integral types | int, char, byte, short, long |
Floating point types | float and double |
Nullable types | Nullable data types |
type variable_list;
//The example of declaring a variable is given below:
int i, j;
double d;
float f;
char ch
//Example of veriable declartion
int i=2,j=4; //declaring 2 variable of integer type
float f=40.2;
char ch='B';
Rules for defining variables
- A variable can have alphabets, digits, and underscore.
- A variable name can start with the alphabet and underscore only. It can't start with a digit.
- No white space is allowed within the variable name.
- A variable name must not be any reserved word or keyword e.g. char, float, etc.
//Valid variable names:
int x;
int _x;
int k20;
//Invalid variable names:
int 4;
int x y;
int double;