Variables & Types

Variables and Types

C# is statically typed — every variable has a type declared at compile time:

int age = 25;           // integer (whole number)
double gpa = 3.95;      // floating-point number
string name = "Alice";  // text
bool isStudent = true;  // true or false

You can also use var to let the compiler infer the type:

var x = 42;         // compiler infers int
var pi = 3.14159;   // compiler infers double

Type Conversion

Convert between types with casting or conversion methods:

int x = 7;
double d = (double)x;         // cast int to double
string s = x.ToString();      // int to string
int n = int.Parse("42");      // string to int

Your Task

Declare these variables and print each on its own line:

• int named age with value 30
• string named name with value "Bob"
• bool named active with value true
• double named score with value 9.5