C# Variables

A variable is a symbol used to store user’s data. It represents a memory location. Its value can be changed multiple times and can be reused many times.

int a; //integer variable 
float b=3.2; //floating point variable which is initializing to some value  
Rules for defining C# variable name:
  1. A variable name can include an alphabet, a digit and an underscore.
  2. It can’t contain any special character in it.
  3. A variable name can start with an alphabet or underscore .
  4. It can’t start with a digit or any special character.
  5. No white space is allowed within the name.
  6. The name can’t be a keyword or any reserved word.
Valid variable name int a; int Ayush; int _unit; int a_1; Invalid Variable Name int 1a; int a*n; int unit 1;
Variable Type                  Example
Decimal Types Decimal
Boolean Types True or False
Integral Types Int, byte, char, long
Floating Point Types Float and double
Nullable Types Nullable Dtata types