CHASH Tutorial

C# VARIABLES

Variables in C#

Variables are containers used to store data in a program. In C#, each variable must be declared with a specific data type that defines the kind of data it can hold.

Why Use Variables?

To store information like numbers, text, or other data types.
To manipulate and use data throughout your program.
To make your code flexible and easier to understand.

Declaring Variables

The basic syntax to declare a variable is:

data_type variableName;

Example:

int age;
string name;
double price;

Assigning Values

You can assign values to variables when declaring them or later in the code:

int age = 25;
string name = "Alice";
double price = 99.99;

Or assign values after declaration:

age = 30;
name = "Bob";
price = 49.95;

Common Data Types in C#

Data Type	Description	Example
int	Stores whole numbers (integers)	int score = 100;
double	Stores decimal numbers (floating-point)	double price = 12.99;
string	Stores text	string name = "John";
bool	Stores true/false values	bool isActive = true;

Tips for Using Variables

Choose meaningful names: Variables like age, price, or userName make your code easier to read.
Follow naming conventions: Use camelCase or PascalCase in C# (e.g., userName or UserName).
Initialize variables: Assign a value before using a variable to avoid errors.
Use the right data type: Picking the right type helps your program run efficiently.

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