4) Mastering Variables in Java: Types, Casting. ⚡💡

In this fourth session of our Java series, we dive deep into one of the most fundamental concepts—variables. Learn what variables are, how to declare them using types like `int`, `double`, and `String`, and see them in action with practical examples. We'll cover how to print values, perform arithmetic operations, and even tackle type casting between integers and decimals. Whether you're new to programming or looking to strengthen your Java basics, this session is packed with insights to help you master variable handling in Java!

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