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Variables
Introduction to Variables in C#:
Variables in C# are containers for storing data values. They have a type that defines what kind of data they can hold and a name that identifies them within a program. C# is a statically typed language, meaning that you must declare the type of each variable before you can use it. Here are some commonly used data types in C#:
1. int: Represents integer numbers.
2. float: Represents single-precision floating-point numbers.
3. double: Represents double-precision floating-point numbers.
4. char: Represents a single Unicode character.
5. bool: Represents Boolean values (true or false).
6. string: Represents a sequence of characters.
Declaring Variables:
Variables in C# are declared using the following syntax:
<type> <name>;
Here, <type> is the data type of the variable, and <name> is the identifier for the variable.
Variable Initialization:
Variables can also be declared and initialized in a single step:
<type> <name> = <value>;
Examples:
Integer Variable:
int age;
int quantity = 10;
age = 25;
Console.WriteLine(“Quantity: ” + quantity);
Console.WriteLine(“Age: ” + age);
Floating-Point Variable:
float temperature;
float pi = 3.14f;
temperature = 98.6f;
Console.WriteLine(“Pi: ” + pi);
Console.WriteLine(“Temperature: ” + temperature);
Character Variable:
char grade;
char symbol = ‘@’;
grade = ‘A’;
Console.WriteLine(“Symbol: ” + symbol);
Console.WriteLine(“Grade: ” + grade);
Boolean Variable:
bool isRaining;
bool isActive = false;
isRaining = true;
Console.WriteLine(“Is Active? ” + isActive);
Console.WriteLine(“Is it raining? ” + isRaining);
String Variable:
string name;
string message = “Hello, world!”;
name = “John”;
Console.WriteLine(“Message: ” + message);
Console.WriteLine(“Name: ” + name);
