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Python Variable

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Variables are fundamental components in programming languages like Python allowing developers to store and manipulate data. In Python, variables serve as named references to objects stored in memory. This article explores Python variables in detail covering their definition, types, usage and best practices. What is a Python Variable? A variable in Python is a symbolic name (identifier) that holds a reference to a value. Unlike some other programming languages Python variables do not have to be declared with a specific data type. Instead, the type is dynamically inferred from the assigned value. Example : # Integer variable   age = 25   print ( "Age:" , age) output : Age: 25 Types of Python Variables Python variables can store various types of data including: Numeric Types : Integers ( int ), floating-point numbers ( float ) and complex numbers ( complex ). Sequence Types : Lists ( list ), tuples ( tuple ) and strings ( str ). Mapping Type : Dictionaries ( dict ). Set Types : ...
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Variables in Java

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The Variables are essential components of any programming language including Java. They are used to store and manipulate data within a program. In this article, we'll explore everything you need to know about variables in Java including their types, declaration, initialization, scope and best practices for usage. Introduction to Variables In Java, a variable is a named memory location used to store data. The Variables provide a way to label and refer to values within a program. They can hold various types of data such as numbers, characters and objects. Types of Variables Java supports several types of variables classified into two main categories: 1. Primitive Variables: The Primitive variables store simple data types such as integers, floating-point numbers, characters and boolean values. Examples: int, double, char, boolean. 2. Reference Variables: The Reference variables store references to objects in memory. Examples: String, ArrayList, Object. Declaration and Initialization T...
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JavaScript Calculator

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I n this article, we'll create a simple calculator using HTML, CSS and JavaScript. This calculator will perform basic arithmetic operations such as addition, subtraction, multiplication and division. It will have a user-friendly interface and provide accurate results for various calculations. Final Output Preview Image: Prerequisites / Technologies Used: HTML CSS JavaScript Approach / Functionalities: Create a user interface with buttons for numbers, operators and special functions. Implement event listeners to handle user interactions with the calculator buttons. Write functions to perform arithmetic operations based on user input. Update the display to show the current input and result. Ensure proper error handling for invalid inputs or operations. Example : <!DOCTYPE html> <html lang="en"> <head>     <meta charset="UTF-8">     <meta name="viewport" content="width=device-width, initial-scale=1.0">     <title...
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