So far you've been writing all your code inside main. Every statement sits in one long block, and if you need the same logic twice, you copy and paste it. That approach breaks down fast. A single typo in pasted code means fixing it in every copy.
In this section, you'll learn to extract reusable blocks of code into methods. You'll define methods that accept inputs, return outputs, and can be called from anywhere in your program. By the end, you'll understand static methods, overloading, varargs, and how Java passes data to method calls.