Variable Program

num1 = float(input("Enter the first number: ")) 
num2 = float(input("Enter the second number: ")) 
sum = num1 + num2 

print("The sum of the two numbers is: ", sum)

let productId = "P12345"; 
let productName = "Laptop"; 
let price = 999.99; 
let stockAvailable = 150;

 int playerHealth = 100;
 int playerScore = 0;
 Vector3 playerPosition = new Vector3(0, 0, 0);

for (int i = 0; i < 10; i++) { System.out.println("Iteration " + i); }

$config = array( "database" => "mysql:host=localhost;dbname=mydb", "username" => "root", "password" => "examplePassword" );

data = [1, 2, 3, 4, 5] squared_data = [] data.each do |element| squared_element = element ** 2 squared_data.push(squared_element) end

Primitive data types:

These are the fundamental data types provided by programming languages, which are used to store basic data such as integers, floating-point numbers, characters and boolean values. Examples include:

1. Integer: Variables of integer type are used to store whole numbers, both positive and negative. E.g., 3, -15, 42. ( int myInteger = 10; )

2. Floating-point: These variables store real numbers that include decimal points. E.g., 2.718, -3.14, 0.0035. ( my_float = 3.14159 )

3. Character: Character data type variables store single characters, usually represented as Unicode or ASCII values. E.g., 'A', 'z', '4', '#'. ( char myCharacter = 'G'; )

4. Boolean: A boolean variable stores a binary value, either true or false. (let myBoolean = true;)

Derived data types:

Derived data types can be created using primitive data types and are available in most programming languages. Examples include:

1. Arrays: Arrays are data structures that store a fixed number of elements of the same data type. Elements in an array can be accessed using their index position, ( int[] myArray = new int[5] {1, 2, 3, 4, 5}; )

2. Functions: Functions are blocks of code that perform specific tasks when called. Functions may have parameters that allow the passing of data in the form of arguments. Variables can also be used to store the result of a function. ( function addNumbers($num1, $num2) { $sum = $num1 + $num2; return $sum; } $result = addNumbers(3, 5); )

3. Structures: Structures are user-defined data types that group variables of different data types under a single name. In programming languages such as C++, structures are declared using the `struct` keyword. ( struct Student { int id; float gpa; char grade; }; Student myStudent; myStudent.id = 123; myStudent.gpa = 3.9; myStudent.grade = 'A'; )

Composite data types

Composite data types, also known as containers, are data structures that store collections of data, which can be of the same or different data types. Examples include lists, sets, dictionaries, and tuples.

1. Lists: Lists are ordered collections of items, which can be of different data types. Lists are mutable, meaning their elements can be modified. ( my_list = [1, 2, 'apple', 3.5] )

2. Dictionaries: Dictionaries, also known as associative arrays or hash maps, are collections of key-value pairs, where each key is associated with a value. The keys are unique, while the values can be of any data type. ( let myDictionary = { "name": "John", "age": 30, "city": "New York" }; )

Understanding the different types of variables based on their data types is essential for writing efficient and robust programs. These diverse types of variables enable you to store and manipulate a wide range of data according to your programming requirements.