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Java Basics Tutorial: Variables, Data Types, and Input/Output

Java is one of the most popular programming languages for students and professionals. This beginner tutorial explains Java variables, data types, and input/output with simple examples.

Quick answer: Java is one of the most popular programming languages for students and professionals. This beginner tutorial explains Java variables, data types, and input/output with simple examples.

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Introduction Java is a powerful, object oriented programming language used in: Web applications Android apps Enterprise systems Before moving to advanced concepts, let’s understand the basics of Java . What Is a Variable in Java? A variable is a container used to store data. Example: In Java: Variable type must be declared Java is a strongly typed language Java Data Types 🔹 int Stores whole numbers 🔹 float / double Stores decimal values 🔹 char Stores a single character 🔹 boolean Stores true or false 🔹 String Stores text ⌨️ Input in Java Using Scanner To take input from the user, Java uses the Scanner class. Example: Output in Java Java uses System.out.println for output. Example: Common Beginner Mistakes Forgetting to declare variable type Missing semicolon ; Using double quotes instead of single quotes for char Not importing Scanner Avoiding these saves a lot of errors. Summary In this tutorial, you learned: Java variables Important data types How to take input and display output These concepts are the foundation of Java programming. Practice daily and move forward step by step Team ToonsCode

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