Variables

1.1. Use Cases

Storing user input (e.g., a name or age).

Tracking program state (e.g., a counter in a loop).

Holding intermediate results for calculations.

Examples

Java:

int age = 25; // Declaration and initialization

double height = 5.9;

String name = "Alice";

Python:

age = 25  # Dynamic typing, no type declaration

height = 5.9

name = "Alice"

C++:

int age = 25;

double height = 5.9;

std::string name = "Alice";