Topic: Methods

Codes:

1. Reusability: Once a method is defined, it can be called (used) multiple times from different parts of a program or even from different programs, which helps in reducing code duplication.

2. Modularity: Methods allow you to break down a complex problem into smaller, more manageable pieces. This makes your program easier to write, read, debug, and maintain.

3. Abstraction: Methods provide a way to abstract complex operations. The internal workings of a method can be hidden from the calling code, allowing the caller to use the method's functionality without needing to understand the details of how it's implemented.

4. Organized code: Methods help organize code into distinct sections that perform specific tasks. This organization makes your code more structured and easier to navigate.

Structure of a Method

• Access Modifier: Determines the visibility of the method (e.g., public, private).

• Return Type: Specifies the type of value the method returns. If the method does not return a value, the return type is void.

• Method Name: The name of the method, following Java naming conventions (usually verbs in lowercase or camelCase).

• Parameter List: Enclosed in parentheses, it specifies the input values the method takes. A method can have zero or more parameters.

• Method Body: Enclosed in braces { }, it contains the code that defines what the method does.

Example

Questions:

1. 计算器DIY

Solutions：