Class Diagram

• Purpose: Models the static structure of a system by showing its classes, their attributes, methods, and the relationships between them.

• Represents a blueprint of objects. It’s divided into three sections:

  1. Class Name: The name of the class.
  2. Attributes: Properties or data members of the class.
  3. Methods/Operations: Functions or behaviors the class can perform.

• Example:

  arduino
  Copy code
  +----------------------+
  | Customer              |    ← Class Name
  +----------------------+
  | name: String          |    ← Attributes
  | email: String         |
  +----------------------+
  | register(): void      |    ← Methods
  | login(): bool         |
  +----------------------+
  
  

State Diagram (State Machine Diagram)

• Purpose: Models the states of an object and the transitions between those states based on events.

Activity Diagram

• Purpose: Models the flow of activities and control within a system.

Use Case Diagram

• Purpose: Describes the functional behavior of a system from the user's perspective.